Geeks Charged me $300.00 for 3 years service. After a few repairs they decided I was going to have to upgrade my service Internet

I signed up for 3 years service for $300.00. (I thought they were a company in a near by city)  After fixing my computer a few times, they informed me that they could  not fix it anymore because I needed to upgrade.  This of course would cost me more.  I told them that as they could not fulfill their obligations, I wanted my money back.  I paid by credit card.  They told me they could not credit my credit card, but if I opened a bank account through them they could refund me.  I of course refused.  After several calls from them and me still refusing, I have not heard from them again.  They have removed any contact number for them so I am unable to contact them.