MTN robbing there customers :(

I am so disgusted with the service provided by MTN and their third party associated to them. I got a call the consultant promoted a modem with a certain amount of Gigs and a certain an amount per month. I agree and take the contract knowing they are calling on behalf of MTN; this took place about 4 months ago. I get home open up the brown box and it was not what I expect it was a router instead of a small modem. I never opened up the actual packing in which the device was in. Every sealed still I go into a branch and explain to consultant this is not what I agree Claremont branch. They took the package back and I completed the cancellation form on the 23.11.2021. I receive a IRMS number too, I have a RCO number as well. SO me as a customer have done everything to cancel this deduction and MTN is sitting back and receiving money from me and providing no service at all OMW. One-month pass MTN deducted the money, second pass MTN deducted the money keeping in mind I DO NOT HAVE THE ITEM I RETURN IT TO THE STORE. I called into the mtn they said they cannot help they provided the third parties number. I call the third parties they told me only the first payment will go off due to the timing and deduction period, and I was okay with that first payment going off. The end of MARCH will be the 5TH MONTH NOW. With no item with no modem with no MTN device in my place but I am paying every month this R350. So please can a **** higher manager contact me and resolve and fix this issues money do not grow on trees just to give away a R350 every month for something I do not have. Moreover, when you speck to an MTN consultant in a branch they tell they have nothing to do with the 3rd parties yet when the 3rd Party called the first thing they said I’m calling from MTN online. Can MTN **** give me my money back now? This cannot continue.