Vodafone India — Sim got deactivated

I am using Vodafone since many years and before coming to Europe i requested to convert my post-paid sim to prepaid for a time being then i will request again to convert it to post-paid when i will return back. Luckily it changed before coming to Europe in the month of August and it worked till November, as customer care guys told me to just have some balance to be working sim and i did as they told me to do but unfortunately i checked my mobile to do some transfers because we need to see the OTPs coming on same number but it got deactivated and connecting to online customer care they recommended to come to Indian Vodafone store for your issues.How can be it resolve for those guys who are not in India and how it can be reactivated. If any please need it urgently.