the acct number and the acct name the scammed call for me

I got a from this num 08109049898 claiming he's calling from mtn ,that mtn is doing 25th anniversary that the are giving people, 40k that it is my turn now that's y he's calling,that is there any POS around me that I can call their acct,I asked y that I should call my acct but he said no that they only transfer to pos that I should give the phone to pos lady that's there,he nah change the narration that me i want to do deposit that the lady should send him 40k that me i will give her the cash,thank God the phone was on speaker I heard everything and I stop it on time.