Unable to contact the company

I've been phoning MBD since this morning. After various tries on ********** 111, the call was answered by Chanelle who was in such a hurry to transfer the call. I told her that I'm calling for MTN and the call was transferred. I was on the line for almost 5 minutes. I eventually dropped the call. I've been trying again, to no avail. It's very funny that now that I've almost settled the account I'm battling to get thru, but in the beginning of the acc been h/o, they had no problem to contact me. To think that I've been h/o for an acc that was supposedly to have been settled 2 years ago, but because I was given the incorrect settlement amount, I had to pay the price for that