Western Union problem

Hi. anybody got this type of problem.

I send money through western union. I forgot my limit is 400GBP and send 407.11 GBP.
The reason i send the extra 7.11 is because of currency conversion as i am not in UK.

However, betfair told met to recall the money. I tried at western union who told me for quick pay it cannot be recalled.

So i told betfair, to wait 1 week as i have increased my limit. but the guy still told me to recall it. So , i do not know what to do.

Anyone can help me?