Mtn poor service

I have been trying since last week to speak to a mtn consultant about increasing my usage limit. My problem is the 135 number does not give you an option to speak to an consultant. I havd tried everything. I have emailed them. No response. They have taken away your ability to increase your own usage limit with self service. This is pathetic. I will be cancelling all my contracts with MTN and go to a more reliable network.