Many Canadians are complaining they can't reach anyone at the Canada Revenue Agency (CRA) by phone to address important tax matters, and the union representing agency workers has joined affected taxpayers in pleading with the federal government to fix the problem.

"It's just so frustrating and disappointing," said Krista Tucker Petrick of North Bay, Ont., one of several affected taxpayers interviewed by CBC News.

She said she has been calling the CRA at least twice daily for weeks to deal with her late stepmother's estate.

Tucker Petrick says every time she calls, she's not even put on hold. Instead, she's greeted by an automated recording about CRA online service options.

"It's [a] government service. Well, I'm not getting any service," she said.

Regina bookkeeper Erin Rudd says she

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