Hero Motocorp — for providing manually edited bill

Sir, I have bought a hero super splendour bike from Nirmala Automobile Bishnugarh HAZARIBAG on dated 22/03/19.I have done my first servicing on dated 21/05/19.They make Unclear bill of engine oil Rs.258.But after printing online bill of Rs 258.they make changes munually by adding Rs 220 for oil boosting. and they charged us 478 rupees.I am. In doubt that they are making fool by giving munually edited bill and making higher charge by us.