In addition to the advice that you have already been given, when you open a case for each of the items you did not receive the seller will have three working days during which to resolve the matter to your satisfaction. If the matter has still not been satisfactorily resolved four working days from the date that you opened a case for each item you didn't receive, then go back into the case details for each item and you ought to see a blue button in each case which will give you the option to escalate the matter to eBay to make a final decision upon. Do this for each case. By doing that eBay will more than likely force a total refund of the money that you paid to the seller for each item, regardless of whether or not the seller agrees to this decision.
