BAD CUSTOMER SERVICE....

I am currently using FB lite with more than enough data available. The past 8 months i cannot see any pictures on FB lite. When i click on a picture to use data MTN is sending me a message that i need to top up my airtime. My question is my data usage has nothing to do with my data. Numerous time i have inboxed MTN and then i was given a ref number and it is far as it goes. Local MTN stores employees coulnt even helped me. I am feddup with the service but they are quick enough to accept my money. The one star rate is not even high enough. My ref number given to me was. SMC/***

Hope you can assist me solving my problems.