Worst service ever

I am having the worst experience Ackermans. First it was an isssue opening the account. And now its an issue with my payments. I'm the 26th of November I received an sms about my installment for the month which was R205 on the 28th I made payment and had trouble putting in my account number as a reference. I called in and was told I must put in the last 6 or 8 numbers of my account on my card. I Did that and the payment went off. I'm the 30th I called again and asked if the money reflectes and was told it takes 48 hours. Now all of a sudden I get a message saying I'm in arrears and owe 490. I have been called over 7 times by different people and i hace examples that I have paid. I even emailed the proof of payment to ********** And collections. I have received no reply but still keep getting calls from different people asking me when I paying. Mr price has an option on the site to pay your account there why can't Ackerman have the same option. I camy be going to to shops all the time to pay. This is really frustrating as I am always up to date with all my accounts. This is truely the worst service ever and I regret opening an account