Tefal Pro Express Steam Generator Iron Model 293?

I only get steam for possibly one shirt then it stops coming out. Iron is still working so I turn it off after each item. When you remove the water tank the red light does not light up so I think it is something electrical. I have phoned number of repairer 0121 200 2740 shown on Tefal website but they are no longer at that number. Help please to solve problem or know of a good repairer. I'm in Essex