Retention not much?!?!

Its now more than two weeks that I am waiting for the specific sale consultant to make contact with me to up grade my main line.

Is this how you do retention of clients? And yes when you call ,I sometimes dont answer because I've got a business to run and when I tell you to call back at a certain time and you dont. Please respect my request

So make contact with your client there is so many platforms to do so.