Cannot Solve my Problem

I engaged the Decoder Payment Plan (DPP) on the 20th of October and the Explora was installed on the 22nd of October. Since then I only had issues with the Explora. At first it displayed that I do not have an active subscription, E16 error. I contacted the call centre but they could not assist me at all. Luckily the E16 error disappeared miraculously on the 24th of October, but I still did not have HD picture and cannot make use of the catch-up services. Again on the 26th of October all the features miraculously came available. Everything went well and all features was working until the following week, the 2nd of November. Now again I receive the E16 error and can not use my PVR and all other features. After calling the call centre, again they can not assist me. The only advice they can give me is to remove the power and dish cable and reset the decoder. I am now fed-up with DSTV and the DPP plan. The call centre staff is really *********** and they cannot assist me with my issues. Which is even more frustrating is that I must call the call centre on my own account to solve Multichoice' issues, after I pay R900 per month for a subscription with no service.