When an injured fox cub entered their garden, a concerned couple called the RSPCA to see how they could help the animal.
But following the advice given to them by the charity's hotline proved to be costly.
Valerie and Ivor Langford from Tamworth, Staffordshire, claim the RSPCA told them to lure the fox into their conservatory and lock it in until their arrival.
But the frightened fox then proceeded to tear the couple's luxury conservatory to shreds causing over £1,000 worth of damage.
Retired Ivor said: "We had seen this fox cub playing around the house, and we thought it had been in a car accident.
"Other people had said it was quite tame and not frightened, so we gave it food.
"But we became worried about it, so my wife rang the RSPCA, as we weren't sure what to do.
"The RSPCA said the best thing to do was to encourage it into the conservatory, my wife offered it some food, and being quite relaxed, it was happy to follow her in there.
"It was OK in there for a while, as he had some food. But as soon as he realised he was trapped, he went berserk."
As the hours passed, the couple's conservatory was torn apart by the pesky cub, who scratched his way through their curtains, carpets and anything that it could bite.
"We kept calling the RSPCA to tell them it was wrecking the conservatory, but they just kept saying that someone was on their way," he added. "But it was five hours before they arrived."
After its rampage, the cub was so tired, the RSPCA officer was able to calmly pick it up and put it in the van.
"When the RSPCA turned up, they said it was very badly infected, and that they needed to take it to the vet immediately.
"After about 15 minutes or so, they rang and said that it was so badly infected, there was no other alternative than to put it down.
"They said it had many contagious diseases, we had to clear out the whole conservatory - absolutely everything.
"We had to strip the whole place. The curtains, blinds, pictures it made a total mess."
The couple even had to take their beloved cat to the vets, where they had to pay an extra £70 to give it an antibiotic injection.
A spokesperson for the RSPCA said: "We received a call about a thin, injured fox in Tamworth.
"The RSPCA Animal Collection Officer advised that in order to contain the fox we would set a trap, once a trap became available. All of the traps were in use at the time. The ACO said that if the fox was contained in some other way to call us back and we would come and collect it.
"The caller stated the fox cub was very tame and had previously been fed in their conservatory. Three days later the RSPCA received a further call to say the fox was confined in their conservatory.
"An RSPCA inspector attended on the same day taking the fox to the local vets for examination.
"Sadly the fox had bad sarcoptic mange on its back and on veterinary advice was put to sleep to end its suffering. The vet advised that the callers conservatory could be cleaned with bleach and water and household flee spray could be used on the furnishings. The inspector gave the caller this advice."