Extremely Upset customer

I have am so utterly disgusted at the service i keep receiving from Mtn, all my life i have been with a other network and i have regret moving over to mtn!!!! I have spent more than R500 worth of airtime in calling to all these different numbers i keep getting saying i need to speak to this and that department. I have taken 2 Huawei P30 pro contracts out online with mtn, 1 of the devices just got stuck on the boot up screen and didnt want to go further, thus while i was doing a software update. I took the phone into Mtn canal walk and they told me that they need to send it away to Huawei and get a report from them, or i need to take it to Huawei myself as it will go quicker, bare in mind its under 2 months old, i send it to Huawei and after 2 weeks of the phone being there i get told that the mother board needs to be replaced, my question to them is should the phone not then be replaced after all it is less than 2 months old,i get told i need to take it up with Mtn off to Mtn Canal walk i go, and they tell me i need to speak to the people i tool the phone out with online, they provide me with the details, and it becomes a back and fourth betweeb them and the mtn store!!!! I am so fed up of all of this ****, i had to pay last month for a phone that i only used 2 weeks of last month, and this month is almost at an end i havent made use of the phone at all as it is still by Huawei waiting for parts, and i will have to pay again althou the phone is not in use. Can somebody please help me get this resolved as i am tired of this back and fourth with Mtn!!!! Worse network and customer service ever!!!! MM Abass ***