Reg. Claim for lien and reverting to parent cadre

I worked in state department 'A' for 3.5 years with outstanding record.But confirmation in service order was not issued even after successfully completing my 2 years probation period.....in the meanwhile I was selected in other state government department "B" .So, I requested to get relieved from parent department "A".They relieved me without mentioning about lien in relieving letter.In Department "B", I was under training ,when senior officer from department "A" asked me to technically resign from job of department "A" .Treating it as technical resignation, I resigned from department "A".Now I want to revert back to department "A". I have worked in Department ’B’ for 2.5 years but have not been confirmed in the service of department ’B’ yet.Because I was new in job ,so I thought mere relieving from Job in department "A" will maintain my lien in that department. Moreover, senior administrative officer of department "A" must be knowing the rules,they were also silent on service confirmation and maintaining my lien.In this scenario can I claim to go back to parent cadre I.e. department "A"?