NETSTAR Bad service

Netstar is the worst l cancelled their contract with one of their employees Phulani Ndlovu 15 Oct 2018.I am now being called by Credit Worx telling me I owe Netstar , I spoke to DezlynL over the phone and she asked me to provide proof , l sent her all the communication and l still haven't received any feedback , the only time Netstar speaks to a client is when they want your money , when they don't expect the silence treatment.