Stranded on Airport

I booked a flight from Durban to Cape Town more than a month in advanced to suite my travel arrangements, two days ago I received a message saying the initial flight I booked has been cancelled and they can accommodate me on the next available flight. Which will mean I will be stranded on the airport for 7 hours , I understand the nature of the air travel industry and with the logistical issues. When I asked if they can accommodate with being sent a complimentary entry to the Bid Vest lounge they said they cannot help me.<br> <br> Due to Mango airlines inconveniencing the customer, I think it is ethically right to keep the customer happy.<br> <br> My first and last booking with Mango Airlines.<br> <br> <br> <br>