Fraudulent activity by a TMobile employee switching my SIM # to a new device to steal funds

Hola,

I am one of the employees at T-mobile (joined last month on 12/7/2020), Today (1/19/2021) while I was working in the store I got a call from a guy who claimed that He is speaking from the T-Mobile service department and that they are just checking if the system is working properly, The guy knew everything about T-Mobile systems (REMO, Tapestry, Quikview, etc) and so I thought that he's really someone who is calling from T-Mobile, He told me to go to Tapestry and gave me some numbers and asked me to swap the sim number on those accounts, I did around 4 accounts (he gave me the sim numbers) and after that when I told the manager about it He told me that it was a fraud call and asked me to hang up. We have already reported to higher officials at T-Mobile but now I am scared that I might get fired for this mistake. I know we are not supposed to do any changes to the account over the phone but the guy on the phone knew everything about T-Mobile and I really thought that he is someone calling from the T-Mobile service department when I searched it on Google I found out that many employees have been fooled by this team of scammers and today I also became their victim, also costumers who got affected or whose sim was swapped it was not done intentionally but because new employees like me were tricked into doing this.