QUEENSPARK DO NOT ACKNOWLEDGE MY PAYMENT AND HARASS ME DAILY

I am a 62 yr old lady. And have an account with Queenspark in one their shops in Cape town,I pay them regularly monthly. During lockdown i could not go in to the shop because of vulnerability to covid and my age,. i called to their offices to ask them as if could pay the account by internet with my bank account. They provided me with their bank account which was a Standard Bank Account. on the 07 January 2021. They told me that the amount to be paid was R169.98 the payment went through,I have proof for it. On the !9 January 2021 a lady from RCS called me about my payment, I then explained to her about my payment,she never had a problem with that,she then informed me about my next payment of R164.48 for the 1st of february 2021,which I paid on the 08 February 2021 the same way I paid in January. RCS is harassing me daily,they do not want to acknowledge the payments that i made in their bank account whereas I have proof that I emailed to them proof of payment to *** za and then to *** In March i decided to make a payment on EasyPay of R173.00,they acknowledged this payment,but still say i need R100 moer charges. On the 1st of April i made another payment of R173.00 on the same EasyPay account, this time they never acknwoledge this paymenti . They do not want to acknowledge my payment. they instead call me everyday and sms left right and centre telling me about increased areas. I cannot take the harassment anymore. This affect my peace of mind. i appeal to you to please help me in matter.