Windscreen Wipers Don't Turn Off in my polo

[drfish]

Hello! Just bought my first Polo this evening. A 1.0litre P Reg - 1996.

The guy I bought it off said the windscreen wipers had stopped working 2 days ago front and back.

Bought the car, got it home, changed the fuse and they worked. YeY! However, they now don't turn off! Bit of a sneeky seller I think.

Anyway, is this something do do with the wiper switch? Has anyone had the same problem before and is it going to be expensive to fix?

Thanks in advance of your help.

Ben