Poor or no reception

Since inception of my contract, i have been unable to make phone calls and have been given all sorts of excuses about network selections that needs to be made as well as trying the sim card in another phone, and the best part of it all was that when i lodge a complaint with virgin mobile they sent me an email requesting an alternative number were i could be contacted as they could not get a hold of me on their own number that i'm paying for, and as date have received no feedback from them at all.