Very disappointed and unhappy with mtn connection

Since signing up with mtn for my business contracts, i have had endless issues with network strength and connection, and as my job requires data connection and calling at the same time , it makes my life hell when im on a call but have no data connection, i really wish i had never signed up with mtn , even trying to call them takes unnecessary time and trying to cancel a contract is proving to be a hassle , 8 dont recommend MTN for business use or personal honesty. Very unhappy.