@Jeremiah1 – this happens often in Matched Betting. Especially if you do a sign up offer with such turnover requirements you need to ensure your Betfair account is loaded. This is no problem though you will just have to do this offer slowly and small bets at a time starting with you bonus bet balance until you get it cleared and then move onto the deposit balance that needs to be turned over 2 x.
If you need help, give a shout here!
Cheers Jamo!