They are accepting any of those ESN whatever they are, issues are just with the MEID's
just look in there screen while they are doing it. Sometimes they don't change it to non t-sim and it shows error "No such esn found in our A-key Database"
Ask them to change it to appropriate option i.e. ------ to non t-sim esn
Also tell them to add " H " in front of esn while rasing the service request!
I don't think after this there will be any issues that you should be facing if you have done the right programming in your handset!