MTN SERVICE

I have my contract with MTN for more than 30 years and was paying my account every month after the 25th via EFT or cash. All of a sudden since the beginning of this year the payment due date, according to MTN, is the 18th monthly because I am a cash paying customer. Obviously a person arranges for payment after your salary date, hence after the 25th monthly. It means the chop and change a signed contract as they wish. When you query, its always the same story. I have been asking for my contract since May this year and up to date they are still requesting it. About a month ago I received a contract of another customer of MTN with his ID, address, telephone number. MTN violated the POPI ACT. Every month my line get suspended because I do not "pay" my account before the 18th. As soon as my contract expires I shall cancel with MTN and get a service provider who has competent staff and know what customer service is. I am sick and tired of going through the same every month. THEY ARE THE WORST SERVICE PROVIDER.