FAILED TRANSACTION ON THE ABSA APP AND ABSA REFUSES TO ASSIST

Every month I purchase a Playstation voucher for my son on the ABSA banking app. I did the same again this past Sunday but when the payment went through, it told me the transaction failed. I never received a voucher code. The transaction of R250 also went off TWICE on my credit card. I called ABSA Credit Card Division and they told me to take it up with Playstation Store, which I did. I sent them an email and spoke to them telephonically, but they told me they couldn't assist and to take it up with ABSA. So whose problem is this now? ABSA said it's not their problem and Playstation is telling me it's not theirs either. I can prove to ABSA that I made that transaction and never received a voucher in return, and as I've been a client of ABSA for almost 30 years and have NEVER complained about paying for something and not receiving it, I feel they should assist me, but they refuse to. It is a product they offer on THEIR banking app, yet they don't want to take the responsibility for reversing the money on my credit card. I'm VERY unhappy and am wary to purchase another voucher through their banking app again. I lost R500 and my son didn't get his Playstation voucher. I'm sure there was a glitch with ABSA's app on Sunday as I've had problems with it the entire day.