Very bad service

Good day. I had two accounts with MBD attorneys Tracker and Virgin Active. I have respectively paid up R431 and R1136,80 as per arrangement. I never received a paid up letter and when I contact the call center, they tell me that they cannot locate my payment after two month yet they have listed me on ITC.

I called yesterday asking to speak to a supervisor or a manager and they dropped the phone on me.

Is it worth continue trying to contact them or having a refund from them and deal directly with my creditors?

Please assist me with this matter.