Complaint(Very bad service)

I am totally disgusted by MTN customer service,I did an online application for a new contract,it was approved,the lady called me last week regarding feedback but I was busy with a patient so I asked for 5munutes to quickly finish up but she hung up,IV been running around since,even went to their nearby store to try and get help but I couldn't get assistance so I called with my colleagues number and I was adviced my application was approved I must wait for a call on Monday to finalise everythin ,Iv been trying to get gold of the people who are dealin with my application but no luck until today,can someone please call me back on ***.