Surat Rto — Not recieved rc book for new car

Address:

Surat, Gujarat

My car number gj5 jl 0453. Car was purchased in feburary registered in march and as per rto records rc book is despatch on 26 / 04 / 15 but we have not recieved as yet. On a talk with rto pal adajan at counter number 24 they have given the despatch number of rc book at said to talk to post office. So first of all when we r subbmitting the things to rto and paying the entire amount to rto so why we have to go to post office for this. Second we also followed up with post office they we dont have such kind of rc book with them. This is complete heresmment for us. So need a reply for that and from where we r going to get the rc book