I live in a 15year(ish) old townhouse and need to change my tap washers.
I have a weird type of mains tap and am having lots of issues trying to turn it off.

The bit to grab is a rectangular "tab" that sits out from the tap body. I guess it is about 1cm in height, 2cm long and about 3 or 4mm thick
Not only is there little room to grab, it is on an angle and it is also seized. I can move it about 1/16th of a turn with a little effort but then it is well and truly firm.
At least it has arrows with "on" and "off" written on it

Does anyone have any ideas that I could use to get some grip on it to turn it?
Is there a tool out there for this specific tap? If there is then the few plumbing shops I asked in brisbane don't about it.








Cheers