Pre paid water meter

I would like to log a complaint of pre paid water meter to lesira a sub contract to Joburg water. I went to Avalon depot to report this matter, as the display screen of the meter is blue, you can't see any number from it. They told me they won't replace it or I must pay the amount of R2500 and I don't know what happened to their screen. We don't have access to water in the house and as a buying water customer monthly they should come and replace or fix their meter display, how are we going to survive in the house without water since I don't have the money they're demanding for the meter's replacement.