Airtel India Pvt Ltd - Charging of international roaming on deactivated plan

My name is Smita N. Sardesai. I have come to Uk on the *-month visa. I purchased Rs.****/-international roaming pack from Airtel on my no********** on *the July ****. After ** days, the roaming is deactivated. But Airtel gave me massage that they will charge Rs.***/- per day till my stay here. I searched on Airtel thanks but could not get any help. the International customer care no has 'outgoing barred'. Nobody is answering my question. And I may get a huge bill as my number is postpaid.