Missing Burger Patty Order from Steers

I placed an order using the Steers mobile app on 24th February 2024. The order number is #***6. The order was assigned to Steers Brackenfell. I added an additional patty to my burger, which I never received. I reported this to Steers Brackenfell on the same day, and the issue was escalated to a manager. However, she expressed uncer*****y about what to do and assured me that someone would call me the following day. On Monday, 26th February, I received a call back from Manager Natasha. I explained the situation, and she promised to investigate and get back to me. However, I am still waiting for a resolution. I am very disappointed to not receive my order as it was placed and paid for. I hope someone from Steers will rectify my issue. It is a simple problem, but I will escalate this further if it is not resolved promptly. Steers took my money and did not deliver.