From what i heard worldpay accepts maestro but i dont know is this true,but is it true?

Check out: Card Types (http://support.worldpay.com/products_services/services/cards.html)

Yes, Worldpay does allow Maestro (previously Switch). I'm sure soon they will update the logos used for the accepted cards as technically Switch no longer exists (although if you got a new card last year it might still have the Switch logo so they will have to leave that there for a few years).

r u sure cuz i checked the card types page and nothing about maestro and if they do support it can i use my debit card as a credit card cuz its got meastro on the back of it?

Yes it is on there:
Solo - JCB - Switch (Maestro): WorldPay process and settle payments in GBP only.