Service tax for 2015-16

Dear Sir,

I did Entry  Service tax on Security Services in Ratio of 12.36% (9.27 % for Service Receiver, 3.09% is service provider) Suppose Security bill Raised for Rs. 41855/- Then ST Paid by our side 3880/- and ST paid by Party 1293/- and paid TDS @ 2% on 41855 = 837/- and we take modvat of Total St paid of Rs (3880+1293) = 5173/- This entry we did from April-2015 onwards bills but as the govt changed the rule Service tax has to be paid by Service Receiver 100% how to paid the remaining ST on old bills from April may and june-2015  and what will be the entry and TDS amount also changed.  I am attaching the way I did entry. Please help if any one know the suggestion.