Airtel — Misinformation about details

Address:

Mumbai Suburban, Maharashtra

I deposited 98 Rs. in Airtel money (airtelmoney.in) a/c, now when I want to transact with this a/c they are asking for Mpin which is shown expired, when I contacted to customer care they are saying you will get new mpin when you provide us right date of birth details but they are saying date of birth is not matching with their data, so I don't understand how I deal with it when every time I provide the right d.o.b., My airtel no. is [protected].
I know and remember by old mpin but they are saying it doesn't matter.