Hi Kerry if the van was bought 2 days ago, take it back to the dealer and ask for your money back as the goods [IE the van is not fit for purpose . Dont accept any promises of repairs as if you do you are agreeing to the purchase of a faulty van .
Contact your local CAB or trading standards .
If you have bought from a private individual then ask for your money back [and hope for the best]
If you paid by cheque ask the bank if it can be stopped
If you paid by credit card or through a finance company ,telephone them and explain the position.
I hope you get your money back and every thing goes well for you Coljac