Super Bad Service from MTN! I AM PORTING TO VODACO

My contract is expiring next month, MTN requested me to call in 30 days before it expires to put in a notice otherwise I will be charges. From Monday 20 April, I have I have been on my phone the whole day trying to get through to the call centre in order to give in my notice. There is never a response and i keep holding. Today, after holding for over 2 hours, my call goes through but the Call Centre Agent just put the phoen down in my ear, meaning that I have to call again and wait for 3 days before someone takes my call. The service from MTN is extremely appauling and unacceptable to paying clients. I am never going to use the network. Although my contract has come to an end, I wanted to keep my number and use it as a prepaid sim card, i have decided that i will port to Vodacom where customers are appreciated and valued. The waiting period is completely unacceptable as we have work to do during the day, we do not have time to keep our phone on our ears listening to the MTN waiting ring tone. I have been a contract customer with MTN for 9 years on the same number, i have never experienced such HORRIFIC service. Somebody must please call me because I am not willing to pay extra.