Vodafone India — unable to port from vodafone

Address:

Mumbai City, Maharashtra, 400078

I am using my vodafone no since august 2017. Which i have migrated from postpaid to prepaid on 27 july 2018. Now i am trying to port to another provider. When another provider try to join my no to his network he get error that my no activation not completed 90 days. As per my knowledge goes activation of my no has been done in year 2017 and i have not port no to another service provide, i have just change the plan from postpaid to prepaid. I spoke to customer service and they are saying its trai rule that i cant port till 90 days which i dont think is the case. If vodafone has their internal policy of treating me as new consumer then its really pathetic.in this matter it should be address by trai.