The Swanswater service provider, based in Southport, Somerset, is being investigated by the Home Office after an electric appliance was hijacked by the wrong person and sold to customers without proper authorization.
The burglary took place on March 18.
It is understood that the burglars had a long history of stealing electric appliances from the Swanssea company.
The company said it was investigating.
It added that it was not possible to provide an exact date of the burglary because of the ongoing investigation.
The incident has prompted the Home Secretary to issue a national alert.
Police are appealing for anyone who may have seen the burglary to contact them.
It comes after two Swansport employees were charged with stealing a range of household appliances from a warehouse in Swansworth, south London.
In March, a third Swansown employee was charged with attempting to commit burglary at a house in Swimsdale, north London.
The theft took place between March 1 and 9, when the burglaries took place at two homes in the Swimsden area.
On March 18, a Swansplash appliance was stolen from a house on the city’s northside, where it was later recovered.
The thieves also broke into a home in the same area and stole a range from an apartment complex, it is understood.
The burglars were later found at the scene.
Police believe the burglary occurred between March 19 and March 24.
They are also investigating whether a swansport electrical appliance service provider was involved in the burglary.
Anyone with information is asked to contact police on 101.
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