Bad coverage,no service network available,data disappearing

For 6 months ref *** i struggle with my internet and mobile phones that has bad csignal or coverage and the past months no service,It shows on phone LTE but i cant open whatsapps or facebook.My data disappear last year Desember (ref ***)and this December it allso happened (ref ***) and Mtn did nothing about it.I paid for a service that i dont have,so break contract?I want back that Mtn took from me what i paid for and didnt get!!!If i could i wont give 1 star because the last six months of my 25yrs at Mtn was the worst Network provider ever!!!