Swiggy — providing two different bill for single order

Address:

New Delhi, Delhi

I had ordered a burger and cheesy dip which cost 129. Rs and after applying swiggyit[50%] i had to pay 102 rs. But when i got my order, a bill attached to it showing 88 rs which is 14 rs less than the money i paid so i go for refund query in which firstly i got know that we send a wrong bill by mistake bur later they told that delivery charge was not mentioned in the bill so 25 rs is not added but after adding 25. The total amount is 113 so now it is 11 rs more than i paid so i told them i am ready to pay 11 rs but how is this possible that a single order have 2 different bill and 2 different type of taxes. I request consumer complaint to take proper action against swiggy so they will not fraud a normal public and also a cheesy dip was missing from my order which cost 20 rs.