Worst experience ever no customer service what so ever

The worst service ive ever received i have a store card through RCS with Game stores and made a payment at the store as always on 12 June 2022 and till date the payment cannot be allocated im being harassed by collections calls and collection fees are pilling up on my account and its negatively impacting my credit record. I've spoken to the store who advised they can't help, RCS collections who referred me to merchant services but still no joy its almost 2 months later and payment still lost of R1200 on the 12 June 2022 at the game store at clear water mall game im being transferred from pillar to post and not help no customer services no one is willing to assist me and I continually get transferred to different departments with no one willing to actually tell me what is going on I get put on hold then they hang up after taking my ID number.