Telkom ***** from their costumers

I wanted to up grade my mother-inlaw ADSL and telephone line, but she did upgrade the router a month back and now information about package were provided to her. We have a 4mb ADSL and we wanted to upgrade it to a 20 Mb line without a voice line. No we are not allowed: "only new costumers are allowed" @ R399 per month, we are only allowed 20 Mb line with a telephone line @ R599 per month. I told them they are steeling from their costumers. She must cancel her contract (with cost) and if she cancel it she will not qualify for the R399 package because it's ends the 30 September 2020 My question WHY can't we qualify for the R399 package Now his will effect myself because we do have a problem with the slow data transfer. This effect our daily work and at the end of the day it will effect TELKOM aswell, if we can't pay for the service. This is not all the same office inform me, that we can't get faster a data line, and COVID came and Telkom provide as with a 10 Mb line and now I qualify for a 20 Mb line Please help we need the faster line for our daily jobs