There are several reasons why bet365 accounts can be restricted, including matched betting, unreasonable betting behaviour, GamStop (self-exclusion), and exploitation of bonuses.
Log in to your Bet365 account and select the 'Sports' tab. Select the markets of your choice and add them to your bet slip. Make sure you have at least three selections, as this is the minimum required for an accumulator bet. Once you have added all your selections to your bet slip, select the 'Accumulator' option.