Paul Cheadle, of Coseley, said he has been waiting a fortnight for Severn Trent to sort out the issue, after the blocked pipe rendered his garden, drive, and even his downstairs bathroom unusable.
The 62-year-old lives with his wife and three foster children, aged 11, seven and six, who have not been able to have a proper bath in fear of making the situation worse.
Mr Cheadle said: "We've been waiting two weeks. It's just all completely flooded with rainwater and sewage. It doesn't smell nice, or look nice.
"The kids can't play in the garden. They can't even have a bath as we can't use the downstairs bathroom.
"I just don't know what to do anymore. I'm at a complete loss."
Retired Mr Cheadle lives in Summerhill Road, but the positioning of his house – he is at the bottom of a hill – mean only he is affected by the flooding.
He added: "It seems to be a blocked pipe. I have been contacting Severn Trent but they never got back. Crews came but then went."
A spokeswoman for Severn Trent, Ria Gaffney, said: “We’re really sorry to Mr Cheadle for the problems caused by the collapsed sewer pipe, and we have teams attending every day to relieve the network to help prevent any further issues, while we work on the repairing the pipe.
"Again, we’re really sorry for the disruption this is causing, and it will be our absolute priority to fix the pipe and get everything back to normal for Mr Cheadle as quickly as possible."