MetroPCS Authorized Dealer

About a week ago we were trying to replace our Daughter's phone, which had been stolen. We were told by 2 employees at this store that rather than replacing the phone, we should cancel the phone. start a 2nd account with the one phone line then come back after 7 days and they could merge the accounts back together and change us to a 4 line for $100 plan that would be better than what we had. Today, after 7 days, we returned and were told they would take care of that. After cancelling the separate account, which still had roughly 3 weeks left pre payed on it, they informed us that they couldn't merge 2 Metro accounts to get the deal. I asked IF I could get the other separate account back since it still had 3 weeks left on it and was told yes. After they removed me from the other plan again and put me back on my own they asked for $50. I pointed out that they told me I could get my old account back, which had time left on it, and they said yes. They then informed me that since I had requested to be split back out, I had to pay the $50. I told them to cancel my service and left the store.