Hi carlos8_lv,
For your 1st question, yes.
For your 2nd question, it depends. Ebay wants to give the sellers' a chance to respond, hence the wait time. However, if you don't hear back, you should contact eBay to follow up.
New sellers have to start somewhere and that's usually at zero ratings and zero stars. It's important to give 1st time sellers a shot and if nothing turns up, open up an eBay case and you should be able to get your money back.
Unfortunately, this often times result in wasted time, which is unfortunate, but that's how the system works. Admittedly, it's not perfect but it works for most folks and is aimed to be balanced and fair for buyers and sellers alike.
We hope this information will help you make a more informed decision on your home needs.