I bought a Samsung N...

I bought a Samsung Note 10 lite on contract previously.. I used it for about 10 months, .. one day I was charging my phone, few hours later it felt very hot and it never switched on thereafter. I took my phone in to cell c because it was still within the guarantee , first time I'm having a problem with this phone.. We got a call that the phone was tempered with before and it was no longer being manufactured so it can't be repaired. It's a new phone.. they offered us a new contract way above more than our initial contract we afforded.. they phone has been with Cell C for months now and no resolution communicated.. This kind of treatment really hits hard on loyal customers like myself.. I've been using Cell C and this Numbers for more than 10years. All I'm asking is the service due unto to us..