Bad Service still no refund after application declined

Bad service from Rentoza my application was firstly declined even thou i have been with them for 2 years already they processed my refund but i had to block my bank card as it was lost so i had to send them my new card details they keep sending me a response saying we refunded you to the old card not understanding that the old card has been deactivated what a nightmare dealing with Rentoza to get my money i still dont have my refund and no one replys or even has an idea of what they talking about all i want is my money i have given them my new bank card details and my bank already comfirmed that there money was reversed back to them because my old bank card is deactivated not sure if this is rocket science but im sure i can do a better job.