World Super Store Limited in Mitcham Road lost its license to sell alcohol in February last year,
It’s after staff were caught selling alcohol and vapes to children in school uniform.
Just weeks later it was again caught selling vapes to a 15-year-old when the legal age is 18.
Trading standards officers also discovered 181 oversized vapes which contained nicotine in amounts beyond the legal limit.
The business pleaded guilty to four offences covering the underage sale and oversized vapes.
It also stated it had no idea of the rules governing vapes, despite the relevant law being introduced in 2016.
World Superstore Ltd was ordered to pay £3,500 in fines and £3,377 in prosecution costs.