Jeff Madison Over charged me and will now give me my refund. saginaw, Michigan

I ordered three transmissions and two torque converters from Wholesale Transmission Distributor.  I received the first two transmissions after having to wait about two months.  In the mean time I ordered another transmission with torque converter and one torque converter for a different vehicle.  I installing the first two transmissions and they work fine.  I had to wait three months to receive the last transmission and torque converters.  In the mean time the credit card bill came and I was charged for two transmissions on this last order.  I called Jeff and said that I was over charged and he stated that he put in the order as two transmissions and would fix the problem right away.  I told him to credit my credit card back he said he would.  After a few weeks go by and I have not received a refund to my credit card.  I call him back up and ask where is the refund he states that he was unable to refund my credit card because to much time has pasted.  While still waiting for my transmission to show up that he keeps saying: its on the way, shipping out today, or shipping out tomorrow, I am  waiting to receive a refund.  I finally received my transmission after three months of waiting,  the guy I ordered it for is irate.  I still have not received my refund and it has been six months sense I received the transmission.  Jeff keeps saying that he is sending the refund check but I have yet to see it and for three months he would not answer or return my  phone calls.  For the last month he has been answering my phone calls again and the lies still continue, saying that he is sending the refund out I still have not seen it.   I will never deal with Jeff Madison or Wholesale Transmission Distributor again.