On-site Expenses

Hi Everyone, I have been working with EY for almost a year now. I have been on-site twice before, and during those trips, all my expenses were covered. Previously, my contract included a daily allowance (DA), travel allowance (TA), and food expenses covered by the client. However, this time, these expenses are covered by EY. In the past, I received DA and TA even though all my expenses were covered. This time, as EY is responsible for DA, TA, and food expenses, I have been told to manage my food expenses from the DA/TA. Additionally, I need to arrange and pay for my cab to the airport. Considering that food in Oman is quite expensive, is it fair for me to manage my food expenses from my DA/TA? They are also refusing to provide a cab for the airport drop. Please guide me on this matter.