Bad service, ********** Behavior

I bought my car last year in January 2020 and got a call from Beame/ Mix Telemathics to activate the tracker that was in the car, for which I did because I thought it was the one I was told about at the dealership. The dealership told afterwards that I shouldn't have done that because I paid for the tracking company Tracker already and that needed to be activated and installed not Beame. I canceled the service afterwards and paid the cancelation fee even though I never used the service. I recently I started to get billed again and I reversed the payments on my app and then went to the bank where they told me that I need to contact Beame/Mix Telematics with regards to this for which I did and it stopped. Upon checking my credit score yesterday, I noticed that I've missed 4 Mix telematics payments in the past 4 months and my score dropped significantly. I never used your service and canceled it within days of finding out from the dealership that I activated the wrong tracking company and yet had to pay a cancelation fee for that. One year later and your company wants want to take more money from me. I tried to call and was busy explaining my problem to one of your consultants earlier today and my call was cut to wait in the line again for another consultant without warning. I've sent and email as well. Please rectify this as soon as possible from your end because this is affecting my credit score negatively.