Rcs/Game store card

Frustrated is an understatement to say the least. I made a payment on the game store card app on the 30th of June, which is something I usually do. Normally hours after I make a payment I get a thank you sms acknowledging payment to my surprise that day no message. Two days past and I decide to check on the app if the payment does reflect, to my surprise it didn’t. I decided to call them and let them know that I made a payment however it is not reflecting, I was told to send a proof of payment to a certain email address. I did just that, the following day I get another message that I missed payment and how it’s gonna reflect badly on credit bureaus and all. I’m disgusted by how I’m treated as a customer, it is not my fault that their app is faulty. I made the payment on time but because their system is somehow faulty, it results in me being a bad payer. I’m shocked by the level of unprofessionalism, I reached out to them but it seems no one is taking my case seriously instead they keep on sending threatening messages. This is no way to treat your customers, do better!!! They do not even deserve half a star!