poor customer service

A customer service called me last week Thursday and was very polity and persistent and convinced me to take sign up for a contract which i did. She has promised me that they will call me in the next few days again with details of when my phone will be delivered and also gave me her contact details in case i want to do a follow up. Today when i phoned the number provided by agent there was no answer. Eventually i called your sales department who told me that they they will put me through to this lady but i had to hold the line for 10 minutes which Frustrated me and i eventually put the phone down. I PHONED AGAIN BUT THE AGAIN BUT ALL THE AGENTS WERE UNHELPFUL KEEP ON TELLING ME TO HOLD THE LINE AGAIN WHICH IS FRUSTRATING, STILL NO ASSISTANCE. in essence this mean you people are trained just to sell to the consumer but lacks assistance and customer service after literally forcing people to buy into your products but then cant deliver. THIS IS NOT FAIR TOWARDS THE CUSTOMER. PLEASE I NEED ASSISTANCE