Airtel — harassment from airtel connection

Dear sir very bad service in airtel connection. Now i have very bad experience with airtel connection because i want to convert post paid to pre paid connection but without start of pre paid connection stop my post paid connection. My connection was stopped from 7 june 2018 to till now i was recharged rs.128 in new sim of prepaid connection that's why i have bad experience from airtel company. I liked airtel connection airtel dish but i don't like because i faced harassment. Now i have no working of prepaid or postpaid connection. I have only one sim. My airtel no is [protected]