Telkom contract and terrible service.. Inferior quality cellphones

Ive had a terrible experience with telkom.. I took a contract for the first time online.. Beginning July and only got delivered to me end July.. I was excited to get my new p30 lite.. Had it for over a month and suddenly the screen stopped working.. So I took the phone to telkom on the 4th of September and was turned away as I never have a receipt.. Imagine this I have a contract yet they wanted a receipt.. Then I queries online.. Only to get an email to say that my cooling off period is over.. And it's obvious it's a software problem.. I've been with mtn for over 20 years and I always had the best of experience. They have so called relationship consultants where we become priority as with any service industry.. Yet with telkom the contract was so easily given cos of my excellent credit score. And they delayed my delivery cos telkom forgot to write my deliver address which delayed my order.. Money was debited yet no fone. Eventually was delivered and I was happy with my phone.. And then the screen stopped working.. How does this happen. I'm appalled at telkom and their follow up.. This forced me to take a contract with mtn.. Not to mention the inconvenience...