Netstar Go keep on debit ordering me even though account is cancelled about a year ago

Netstar Go...... After a year of trying to suspend my service you are still debit ordering me every month. After multiple attempts I lose money every month for a service I don't want, need or capable of using as I am not living in SA currently. Trying to log in with my membership number the Netstar Go website says it does not exist which tells me the service has been suspended yet I pay for it months on end! My last actual telephone call with them seemed promising as I was told the previous *********** employee did not put a request in to stop my service, but my membership number cannot be found go figure, and that he logged the proper request now. Low and behold the debit orders keep going off! Yesterday I logged an inquiry on their website but I'm not receiving any feedback. The time that my membership number was suspended should be regarded as the end and all debit orders refunded from that point forward. Netstar Go, I just want some service and to sort this out ASAP! please and thank you.