Mobicred is ****ing me

I used mobicred to purchase an item online. In May 2024 i spoke to a consultant asking how much is my outstanding balance, she said R200 and even sent an sms to confirm that i will pay the outstanding balance on the 17th of may as agreed. Early june i start receiving calls that i owe R267. I told them I was told my outstanding is R200 and even received an sms to confirm. I sent proof of payment and they said it doesn't reflect on their system because I need to pay R67. I paid it anyway and sent proof of payment. They sent me an email acknowledging that they received the proof of payment. Im still getting calls to date saying i should pay R267.. On the 29th of June they deducted R144 from my bank account. I can't despute or stop the debit order. I've been calling them ever since and one of them told me they don't know what's happening because im not the only one complaining about this.