Aircel — refund of ir roaming charges and excess billing when the parent company itself got into a jam

My cell no is [protected]
I an e s kumar i had paid a refundable sum of rs 3000/- on 1702/18 for activation of international roaming [ i r ]charges for activation during the period from 08/03/ to 25/06/18 this was due to the wrong advice of the front desk staff as he confirmed that aircel ir would work this was done vide receipt no eps40237047 st 17/02/18.
In a weeks time or so the system and aircel services were crashed and i have not been able to meet any one in the aircel office due to chaos and public crowd there at.
This amount needs to be refunded to me by way of a crossed cheque and sent to my chennai residential address which is in records of aircel
I may add that during my service at idbi i had served as a director on the board of aircel during[protected]
I think i deserve a fair and genuine treatment
I have switched over to another service provider retaking the same cell no
My bill for aircel has been thro ecs with my billing cycle from 19 th of every month
Having paid a bill of rs 488//- for my last billing cycle on 0503/18, thro idbi bank when i was to change the service provider on 06/03/18, the system showed again a pending amount ofrs 490/- which i had to pay under duress (Vide idbi card transaction code 0330344) the system could not generate ny bill as it was faulty) as i immediately needed to switch over the service provider before i left india on 07/03/18
The aircel services were not avialable at all from second week of february and so this amount of rs490/- is also a wrong& excess levy which needs to be refunded to me
The total amount payable to me th so would be rs 3000/- +rs 490/- totalling to rs 3490/-
Would be thankful to have the total refund at the earliest
Thanks and regards
E s kumar
Retd c g m i d b i