To release your Free Bets, you will then need to place qualifying bet(s) to the value of your deposit (up to a 10 cap or currency equivalent) and allow the bet(s) to settle - they must settle within 30 days of claiming the offer. Once your qualifying bets are settled your Free Bets will automatically become available.
The betting amount limit on Bet365 can be increased by contacting the customer care services or the site managers. They are the ones who confirm the increase or decrease in the betting limit. The site states that you have to put in a request and upon such request the site will confirm the increase in the betting limit.