Hello. We were recently left completely without water due to a burst main in the locality. It was a major and lengthy repair taking from last Friday night until Monday. The supply has now been fully restored - according to the local authority - but, as yet, there is no cold water in the bathroom upstairs with barely a trickle from the cold tap. The electric shower cannot be used and the toilet is not emptying fully when flushed. The dwelling is a duplex apartment (upper levels). Is there anything I can do or check before calling a plumber? Thank you .