BAD SERVICES AND STAFF DO NOT KNOW WHAT THEY ARE DOING

For the past 4 months I have been sending all my proof of payments to Princess (ref ***) and Baldwin (ref ***) and today I have not yet received a response yesterday I received an another sms saying that I owe R1196.99 another sms saying R595.44 I have paid all my account (BA***) an I do not owe anything to you especially the R1196.99 and the R595.44 I would like to do an upgrade tomorrow and only to be told that I have to pay this money first which is unacceptable I request statements from October 2020 until now they do now have any records of me making payments but they are claiming I owe them

I have two cell account and the one is correct but the other they can't give me details MTN is supplying very poor services