Watered Down Voicemail Service - VMLITE on MTN

<p>Since I ported back from Cell C to an MTN prepaid service, My voicemail service are not a fully - functional in other words, people cannot leave messages, but rather they only get a prompt that I will be notified of their call , so that I can call the person that was trying to get hold of me, back.</p> <p> </p> <p>This is unacceptable as that means calls that I receive from people whose's CLI is set to a company switchboard, I cannot call back, as I don't know who called me in the first place.</p> <p> </p> <p>Could someone from MTN urgently address the matter, as I am strongly considering to port my service to another provider?</p>