BAD SERVICE MTN

I am so frustrated with MTN the service is bad, and agents are not well-enabled to deal with "complex" queries. How long does it take to allocate a payment? I have been sent from Pillar to post from collections to customer service, to legal you name it. Caroline and Genevieve from collections failed to assist. Cerleaze Jabobs who sent an email on 8 May still has not allocated the payment. This is really frustrating.