Seriously disappointed

Can't seem to get 3G connection only 2G and it's not the first time. I bought a 1GB data bundle which will expire at 6am today but I can't do jack with it. There was nothing wrong with my 3G connection last night. Can someone please tell me what's going on and what's going to happen to the airtime I wasted to purchase the 1GB daily data and please don't tell me it's the area I stay in coz like I said there was nothing wrong last night when I purchased the same bundle and had great 3G connection and it ain't my handset either coz I inserted the sim into another device and it's still the same issue. I've overlooked this type of issue many times before but now it feels like you guys are robbing me and I'm disappointed in this type of service especially from you MTN. I'm using ***. I even tried calling customer care all I got was \all our consultants are busy\" and blah blah blah, seriously??? All of them are busy?"