MTN Business terrible service

We app**** for a business fibre line on behalf of our client in April this year. To date, this line is still not live despite their being a physical line already in the office and the building itself having been live since before we app****. The "account manager" has not been at all helpful and is unable to give us a reason for the delay, and is now no longer responding to our emails. Someone in charge needs to contact us to get this sorted out.