Price Lock

I had a normal explora premium subscription everything was fine until i got a call from Price Lock consultant to sign up with them. The consultant told me because I am existing Premium subscriber they will combine the Price Lock subscription with my current Premium subscription. In November 2019 a week later after I signed up for the Price Lock my decoder was delivered via a courier company. Then at the end of November 2019 my subscription was in excess of R2000.00 with no installation done. To my surprise my decoder was not even installed and it was eventually only installed yesterday. When I call the the call center, I have been send from pillar to post all the time, I have send emials phone calls but nothing is happening and their is no progress. My decoder has been disconnected now and Multichoice is claiming that i owe them in excess of R5000.00 for subscription. If I do my calculation I am paying for 2 standalone subscription instead of 1 combined subscription in the period of 3 months. I am frustrated and hopeless because u do not get to speak to a manager at Multichoice instead you speak to these customer consultants that can do close to nothing for you all the time. I would appreciate it if someone can help me please.