TDS on payment to your operator

Hi Members.. I run a travel company where we act as intermediaries between corporate clients and hotels. We take a tax inclusive rate from hotels add a slight mark up and pass on to the clientWe pay the hotel in advance and collect payments later Obe of our corporate clients has made payment after a 10 percent TDS deduction on the total bill (Not just the markup value) My questions are 1 Is that required 2 My markup is less than 10 percent so it is a loss. I thought we needed to pay a1.5 percent GST Plwaae advise