Donna Kempson, 59, is fighting oesophagus cancer that stemmed from kidney cancer.
After having one kidney removed, she can only digest water.
While most households now have a water supply after 58,000 were left high and dry for two days, the Swaythling native and her husband Jason still have “cloudy and smelly” water coming through their taps.
Donna called Southern Water three days ago to request a delivery of drinking water and said she was told she had been added to the priority register for home delivery.
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“They promised us three days ago they’d deliver water and we still haven’t received any,” Jason, 56, said.
“Two days ago, we rang them back because we hadn’t heard from them and they said they’d get it out by the end of the night.
“We’ve had nothing.”
Donna’s cancer has put her in a wheelchair and her husband Jason has a tunnel line through his chest as a consequence of kidney dialysis.
Jason said: “We rely on water to stay alive, for our daily intake, because of our conditions.
“You get put on priority because you are priority, and you’ve been completely ignored. It seems like they’re not bothered.”
The couple do drive, but because of their conditions, they cannot lift heavy bottled water from the filling stations back into their house.
Water supplies in shops were ransacked and Jason said he had no choice but to buy small bottles of flavoured water to keep their conditions steady.
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Without the promised home delivery, the couple could have been left with no water whatsoever.
“I just don’t think we’ve been treated very fairly on this,” Jason said.
“It’s really annoying because we’ve got to keep going out and buying flavoured water to just put us through. We’ve got nothing to use to cook or wash.
“If we drink anything else we’ll be ill, we just can’t do it. We’re disgusted at how they’ve completely neglected us.”
Southern Water Chief Executive Lawrence Gosden said: “Our more vulnerable customers – those on the Priority Services Register – were poorly served, having to wait too long for deliveries to arrive, and in some cases not receiving a delivery at all.
“There’s always a degree of confusion over the PSR during an incident, as we merge our lists with those of councils and the NHS, and people phone in to let us know that they or a relative are vulnerable.
“The list more than tripled inside a day to 20,000 households. However that’s no excuse.”
A spokesperson from Southern Water also said that if water has a brown or black colour, customers should run their tap for a few minutes and it should clear.
They added: “If this doesn’t work, turn the tap off, wait 20 minutes, and try again.
“It’s fine to use your water as normal when your water runs clear. ”