Mauijon

Hi I've completed ten trades in the last few weeks and my fees for each trade is £12.99 which seems like a crazy amount and I can't see how I reduce it down although the website says after 3 trades I should be getting charged £3 per trade on their default setting and I haven't made any changes? The call centre won't answer the phone. Can't keep trading at this rate so any help would be greatly appreciated Thank you Jon