Worst service ever Huawei

I upgraded to the Mate 20 Pro in January. After 1 day I had issues with my screen dimming on 80 to 85% brightness and less as if the auto dimming was active. Did a settings reset as well as a factory reset as per HiCare app. Problem still persisted. I contacted my service provider MTN and they exchanged me for a new one. Same day, same issue. Went back to MTN, ordered a new one. Week later I got my 3rd new one. Same night, same issue. At this point I paid a month contract fee with my phones not being 3 days old. Mtn suggested I send it in to Huawei for assessment. Took 4 days for RAM Couriers to take it 300km. After a week no one at huawei repair centre contacted or even gave me an update on my phone. I had to phone my self to get an update. Days passed and no update or issue resolved. In the mean time I left countless messages for assistance on Huawei Facebook and Instagram. No reply. I went on huawei fan's SA Facebook page and asked where I can get assistance. A person named Basil De Klerk immediately asked my details and contacted me. I told him my story and he said he would look into it. 2 days later he organized a brand new phone and couriered it to me. 4 days later, thanks RAM, I got a new mate 20 pro. Same night, same issue. My second contract payment was subtracted and I'm on my 4th new phone without having one for more than a week. I Contacted Basil and he started to contact Rudy Heinrich who is a area manager or something to contact me to assist. After a few days of getiing no response I asked Basil again who told Rudy again to contact me. No one contacted me. I complained to Basil and he gave me the email of Fazel Bolley, head of customer service. I mailed him with my issues and received no reply. Spoke to Basil again and he told me to give it a week. No one has responded since. I'm on my 4th brand new Mate 20 pro and still has issues. I haven't gotten any response or contact from huawei to get this resolved. I don't want the phone anymore but what can I do? No one seems to care. WORST SERVICE EVER