Reneged on bet

Be extremely wary when placing bets with this company.
I recently went on a bet comparison website to back Australia to win the fourth ODI played on the 11.09.15. Betway were displaying odds of 2.05 for an Australian win, the closest comparison were companies offering 1.92 for the win. I therefore placed £10 for a possible return of £20.50 as opposed to a possible return of £19.20 with one of their competitors.
The next day I received an email stating that this bet was void as the incorrect odds were displayed. I find this totally unacceptable. If I placed a bet with them and noticed better odds elsewhere would they be so keen to void my bet so I could take up the better offer? We all know what the answer to that would be!
I'm in no way a big gambler, and I'm sure Betway won't miss my services, I just feel this bet reneging is something you wouldn't put up with in the school playground let alone from an established company like theirs. It may well be an established practice but this is my first experience of it and it has left a real sour taste in my mouth, all for the possible loss of £1.30.
Shame on you Betway!