Really poor customer service for a loyal customer

I am trying to cancel my service with DSTV and they have advised that they cannot do it straight away and i would have to wait an entire month. The only option, they have advised, is to not pay the account and then i would be charged the pro-rata amount at that stage only. I then said that would affect my credit profile to which they responded saying "yes it would"

I spoke to the manager on the floor and she said that she cannot cancel immediately and i would have to pay an entire month even though i will not be watching at all.

All of this after i was asked for the reason for cancellation, and when i said that i had fibre installed and i did not require their service.

I need help please.