Airtel Internet — Non activation of my phone no after 4g upgradation

Address: Mumbai City, Maharashtra

After upgradation from 3g to 4g.my mobile no [protected] is barred.??? Airtel customer support at level 1/2/3 are unable to resolve it... Its been 12 years with this no.and now 4g made my life miserable.. No incoming/outgoing/no data/no sms plans are working after i moved onto 4g. I have travelled with this no.on 70% of earth water and 60% of land of the world.