If previous advise didn't work. The link below should help.
https://www.ebay.com/help/policies/member-behaviour-policies/user-agreement?id=4259#17.%20Legal%20Di...
Look for "2. Arbitration Procedures"
This is an excerpt from it:
A party who intends to seek arbitration must first send to the other, by certified mail, a completed form Notice of Dispute ("Notice"). You may download a form Notice - opens in new window or tab. The Notice to eBay should be sent to eBay Inc., Attn: Litigation Department, Re: Notice of Dispute, 583 W. eBay Way, Draper, UT 84020. eBay will send any Notice to you to the physical address we have on file associated with your eBay account; it is your responsibility to keep your physical address up to date. All information called for in the Notice must be provided, including a description of the nature and basis of the claims the party is asserting and the relief sought.
If you and eBay are unable to resolve the claims described in the Notice within 30 days after the Notice is sent, you or eBay may initiate arbitration proceedings. A form for initiating arbitration proceedings is available on the AAA's site at www.adr.org. In addition to filing this form with the AAA in accordance with its rules and procedures, the party initiating the arbitration must mail a copy of the completed form to the opposing party. You may send a copy to eBay at the following address: eBay, Inc. c/o CT Corporation System, 1108 E South Union Ave., Midvale, UT 84047. In the event eBay initiates an arbitration against you, it will send a copy of the completed form to the physical address we have on file associated with your eBay account. Any settlement offer made by you or eBay shall not be disclosed to the arbitrator.
The arbitration hearing shall be held in the county in which you reside or at another mutually agreed location. If the value of the relief sought is $10,000 or less, you or eBay may elect to have the arbitration conducted by telephone or based solely on written submissions, which election shall be binding on you and eBay subject to the arbitrator's discretion to require an in-person hearing, if the circumstances warrant. In cases where an in-person hearing is held, you and/or eBay may attend by telephone, unless the arbitrator requires otherwise.
The arbitrator will decide the substance of all claims in accordance with applicable law, including recognized principles of equity, and will honor all claims of privilege recognized by law. The arbitrator shall not be bound by rulings in prior arbitrations involving different users, but is bound by rulings in prior arbitrations involving the same eBay user to the extent required by applicable law. The arbitrator's award shall be final and binding and judgment on the award rendered by the arbitrator may be entered in any court having jurisdiction thereof.
Costs of Arbitration
Payment of all filing, administration and arbitrator fees will be governed by the AAA's rules, unless otherwise stated in this Agreement to Arbitrate. If the value of the relief sought is $10,000 or less, at your request, eBay will pay all filing, administration, and arbitrator fees associated with the arbitration. Any request for payment of fees by eBay should be submitted by mail to the AAA along with your Demand for Arbitration and eBay will make arrangements to pay all necessary fees directly to the AAA. If (a) you willfully fail to comply with the Notice of Dispute requirement discussed above, or (b) in the event the arbitrator determines the claim(s) you assert in the arbitration to be frivolous, you agree to reimburse eBay for all fees associated with the arbitration paid by eBay on your behalf that you otherwise would be obligated to pay under the AAA's rules.
