The sentences given to three former care home workers who mistreated a resident will not be increased, the attorney general's office has said.
The abuse, which was captured on a hidden camera installed by the family of Gladys Wright, took place at the Granary home at Wraxall in 2012,
Daniel Baynes, Tomasz Gidaszewski and Janusz Salnikow pleaded guilty to ill-treatment.
Baynes also admitted stealing food and was jailed for four months.
Salnikow was also given a suspended jail sentence, while the others were given community orders.
A judge at Bristol Crown Court barred all three for life from working with vulnerable adults.
The charity Action on Elder Abuse had written to the attorney general's office calling on him to review the sentences handed out to the three men.
They had argued what the men did was "appalling" and that the sentence "did not convey the seriousness with which the public view such abuse", and "will not act as a deterrent".
A spokesman said the campaign group had asked for a meeting with the sentencing council and the Crown Prosecution Service (CPS) in an attempt to influence the guidelines given to judges and magistrates.
The attorney general's office said that the offences did not fall into the category which would be normally reviewed for being "unduly lenient".