"Installation Assurance for Wireless broadband customers
Where you buy wireless services from us, we will do everything we can to provide you with a working broadband or phone and broadband service. If you are having any problems getting a reliable service established, please call our Customer Helpdesk (0800 4 WOOSH) for assistance.
If you have any issues related to our service that we are not able to solve over the phone we will send a mobile technician to you. They should resolve any issues. If however, you are still not satisfied we may provide you with a wired (ADSL) broadband service.
If, after these steps, we are not able to provide you with a reliable broadband service within 30 days of joining Woosh, you may return your equipment to Woosh and we will happily refund you any installation and monthly charges you have paid us."
Looks like now if wireless doesn't work you are locked into them supplying DSL.

