“I don’t understand how a company can just dispose of somebody’s belongings”, Mrs Henshaw said.
“Its just horrendous, you know how long it takes to build up your possessions and its just gone in landfill.”
Mrs Ogle has been given £2,500 in compensation by insurance firm Royal Sun Alliance, who employed the contractors.
A spokesman said the company was “sincerely sorry” and offered the sum to compensate for the “undoubted distress” the mistake had caused.
He added that the Financial Ombudsman Service had concluded the handling of the complaint and the compensation payment “was reasonable”.
But Mrs Henshaw said it was “not enough” given the hurt caused and she wanted her grandmother’s story told as “I’d hate this to happen to anybody else.”