No service and cannot use prepaid options

Hi I ported to Telkom in 2018 and have since had problems, I use prepaid but I have been told several times that my sim is contract depriving me of using other services they offer such as "Mo nice", I asked them to fix this and a year later I still cannot use some of their services and have given up because they always tell me they lodged my complain but nothing happens. Yesterday my sim card went off for no reason, I called Telkom and was told that my sim card is closed again for no reason and was given the reference number *** the consultant told me that she made this urgent and said my phone should be fine by morning however I wake up and my phone still reads no service,