Unproffessional and wont refund!!

My son accidently purchased a game online on the 04/02/2018 and after trying to get it sorted via his PLaystation I sent a email to ********** on the Monday 05/02. After numerous emails back and forth and having his account blocked and then set up on my name etc they have given the refund for the game which is R1,599 but instead of refunding it back onto my credit card they have put the funds on ewallet. I find this to be totally ridiculous as what are we supposed to do with a credit balance on Playstation plus, my son only purchases games once or twice a year for his birthday or Christmas and now I am needing to ask the bank to reverse the transaction. Today 07/03 PS has the nerve to deduct R109.00 for PSPlus monthly . I am seriously fed up of the unproffessional service.