Best answer by Jon1
Yes it can and is quite easy to do.
On homepage tap 3 bars top right.
On dropdown menu tap on help.
Tap on wattbot to open.
Type " message the team "
Type amd ask for your payment to be increased by £X* amount per month.
Sometime on monday you will get a response so keep a lookout for it in wattbot.
* insert the amount you feel is required.