For a "sustained and exploitative campaign" of obnoxious calls, a white goods company in Brighton was fined £200,000.
According to the Information Commissioner's Office (ICO), It's OK Ltd made 1,752,149 calls to individuals who had registered with the Telephone Preference Service (TPS).
Between July 1 and June 1, 2020, the offenses were committed.
The ICO stated that evidence indicates that senior citizens were purposefully targeted.
The ICO added that unless a registered TPS user has indicated to a particular organization that they do not object to receiving calls from them, it is illegal to call anyone on the TPS for marketing purposes.
It's OK Ltd allegedly tried to mislead people by informing them that their white good warranties had expired and pressuring them to pay for services they may not have needed, according to complaints the ICO received.
Over the course of the 11-month period, the company made more than three illegal calls per minute on average.
"The actions of this company represented a sustained and exploitative campaign possibly targeting the most vulnerable," said Andy Curry, ICO's head of investigations.
"Pressure tactics, false information, and contacting people listed on the TPS are dishonorable behavior. ".
A customer who complained claimed his 82-year-old mother was "bamboozled" into paying £194 for an extended warranty on her 10-year-old washing machine.
For comment, It's OK Ltd has been contacted.