Data Bundles and Service

I've really been left with a bad taste in my mouth by MTN over the last couple of months.<br> <br> Firstly i hardly ever have 4G connection anymore, i'm always on Edge so i've asked MTNService on twitter and got a response after about 2 weeks to which they sent me a link to follow to submit my query to. I did it the same day and haven't received any response from them.<br> <br> Secondly i don't know why i buy data bundles seeing as they use my airtime for data instead of deducting from my data bundle. I would have say 200MB of data but i wont be able to receive any messages or access the internet because i don't have airtime - but i didn't make a lot of calls - all my airtime went to \data charges".<br> <br> You can't call 808 because you hold on forever and then the call is just dropped"