Issue in transferring Service Tax Credit in GST Regime OR Claiming Service Tax Refund

We were having Service Tax Credit of Rs. 64,090/-. We were wishing to carry forward this credit into GST when GST has been made applicable from 01/07/2017 through GST Trans-1. We have filed Original Service Tax Return of Q1 of F.Y. 2017-18 on 27/07/2017. In the Original ST Return credit figure of above sum has been wrongly shown in utilized cell by mistake. Later on at the time of filing Trans-1 we realized our mistake and tried to rectify the same through revised return, hence we filed revised return on 15/09/2017 in which we have claimed the above credit correctly. The same return has been rejected by ST department first. Due to rejection of revised return we were unable to transfer our ST Credit to CGST, so we had contacted to concerned STO for the above issue. He advised us to make refund application for the same. Accordingly we had complied with the same. Afterwards revised return which was rejected earlier has been accepted by department and we were not known to the same. Later STO had refused to refund the amount and the case was transferred to another STO. Now he (new STO) also refuses to grant refund and he told us to file Trans-1 on the basis of Revised Return. Meanwhile the Due date for filing Trans-1 was elapsed. Hence neither we got refund from service tax department nor the credit in GST even though we have made regular follow up for the same. Kindly let us know a better way out from this situation. Thanks in afdvance