Reebok sending only Partial refunds

[bostonredsoxx24]

I have ordered  multiple items in multiple orders from Reebok's official Ebay store. They have decided to cancel all orders on their behalf and have said that I have requested it, which is not true. They decided to PARTIALLY refund all of my orders through Paypal and not through EBAY, to avoid all the seller fee's. They have violated all terms according to Ebay as a seller. In total I will be missing over $200 in refunds because they decided to only partially refund some items. What are my options?