Airtel — sim mnp

Address:

Chennai, Tamil Nadu, 600097

Hello,

I am having problem in porting my number from BSNL to Airtel postpaid. On 27th Dec'17 I applied for my MNP process via online then on 28th one of the airtel associate came to office and collected documents regarding the process and said sim will get activated in 1 week. After the 1 week time my Bsnl sim was deactivated but still airtel didn't get activated.So i called Customer care regarding this issue they said your number was deactivated so plz visit airtel showroom so that they will activate your number. On 8th Jan'18 i went to Airtel Relationship Office, Near CTS, Okkiyampettai, Chennai and submitted my port pin number(BH334987) and all the documents they said me to submit and also given Rs. 300 for that as they asked me to pay. Now this is 11th Jan'18 and my number not yet been ported into Airtel. They made me a call regarding porting and asking me to pay Rs.3500 for activating my number.I have been using that number for more than 5 years and i just want to port my number from bsnl to airtel but they are asking that much amount for activating it. Is that necessary to pay that much amount to activate my number???