MTN and Mondo Online Services

Worst experience, using the online ordering system. Received a call very quickly to subscribe to a contract did so took delivery of my parcel on the 19th, was told activation will take between 2 and 24 hours, yet still no activation we are now at Tuesday the 23rd. Call centre just transfers you from one department to another, supplying about 6 different numbers. Then advising I should call the online company Mondo which is even worse, just telling me I need to call MTN to do the activation which after calling MTN I get referred back to Mondo stating I need to tell them to update the order details. This is definitely the worst service I have had from a cellphone services provider. Do you guys have any idea how to resolve customer complaints because quite frankly customer service is 0%