At the start of october I bought some golf balls on ebay from a seller with very good feedback, I never received the golf balls, contacted the seller he apologised and said he'd send some more. These also never arrived. Contacted him again last week and he offered me a refund which he never put through. Now he's ignoring my messages completely I've never had to dispute anything on ebay or paypal before so wasn't aware of the 45 day dispute limit. Is there anything I can do to get my cash back?