RMS wont terminate service on positive balance.

my smart wallet balance was almost R 200 before i left my old apartment last month, i stopped everything on the main and vacated the premises, this was on the 24th May 2020, to date my balance is R 24 and i am told i should load it before it gets depleted, i have tried several times without success to cancel the services, on call, on whatsapp and even email but until today i am still bound by their terminated contract.