how do you change a drum shaft on an indesit is60v tumble dryer?

I have just changed the belt on my tumble dryer and when I put it back together and when I switched it back on it was making a terrible noise. On further invesrtgation I noticed that the drum had dropped down at the back and was rubbing on the motor I must have broken the drum shaft fitting the belt. It is an indesit is60v. Please help as my wife has fallen out with me for making it worse.