worst experience ever

my husband did an upgrade 4 weeks ago after 2 days we decided to cancel the contract , called into the call centre reffered from pillar to post eventually advised to call summer mobile sopke to a lady by the name of cindy who advised it takes 72 hours upgrade will be cancelled, called 808 again advised that nothing has been done my husband called and spoke to vincent khoba at summer mobile who informed he that it will take another 72 hours. then i called mtn on sunday 20/3/2016 again 808 first call answered by a lady name mandisa whi intriduced herself let me say my piece then says IM OFFLINE please call back so someone else can help ...why pick up the call if you cant assist????then the second call to a gentleman by the name of Hloni who heard my story and then reffered me to summer mobile guess what i was disconnected called for the third time assisted by a lady by the name of Kholefelo who heard me and explained the process and then logged the query with sales still awaiting for assistance from mtn, i have had contracts with mtn ever since i have been employed that is more than 15 years but cant wait for my contract to expire i want to have no more dealing with mtn service sucks