Pathetic service after schedule flight delay

To whom it may concern:<br> <br> I received a call from a mango call centre scheduled changes service consultant last Thursday indicating that my flight scheduled for the 29th of May will be delayed from 5 pm , now scheduled to leave at 18h15.<br> When i inquired whether an earlier flight could be obtained , the answer was a straight on \No".<br> I booked this flight - in view of the fact that I am running the comrades marathon. Mango cannot breach its agreement with me and not offer any other suitable options.<br> I have a scheduled training and other sessions that start at 6 pm in preparation for this once in a lifetime race. I find this kind of service unacceptable"