Hi, sorry to hear about you problem, very easily done. my advice is: put a few gallons of diesel in the tank( fill up some cans) turn the engine over for about 15seconds a time.try this several times. if it does not start you could join one of the cheap internet A.A or R.A.C. type services, for about �50,.wait a couple of days then phone them up and tell them it won't start.don't say why, just say you ran out of diesel, but you've filled the tank up now but it still will not start.let them sort it. so much cheaper than calling out a garage. I must add, it would be no use priming the pump as it will still be full of petrol. I have put petrol in my diesel before now ,in my peugeot 205 xld and no problem at all, but you must fill the tank with diesel or you will never get it going, as diesel is heavier than petrol and will sink to the bottom where the fuel suction pipe is, so it will suck diesel then when you drive it should all mix together.
hope you succeed, alf.