MTN is a bad cell network. They keep on taking my data and airtime.

I have been with MTN (contracts) all my life and I'm fed-up for their terrible service they're providing. My data keep on disappearing and I'm only using Wotsapp and NO other social media. How can 100MB and R40.00 airtime be depleted in 24 hours..?

I'm not using my Internet for searches often so why should I spend more on Data and airtime.? I want my data and airtime back please. Reimburst me NOW.

Thanks God I have ended my contracts.