The workers and locum pharmacists with the troubled Jhoots Pharmacies face an uncertain future as many of them have not been paid for weeks, and it has sparked closure fears.
There are about 150 Jhoots Pharmacies in the UK, of which 129 are run by Sarbjit Jhooty.
Manjit owns more than 20 Jhoots branches through his companies Pasab and Jhoots Healthcare.
According to Pharmacists Defence Association, locum pharmacists who have worked at Jhoots Pharmacies run by Sarbjit Jhooty are awaiting £670,000 in unpaid fees.
Unlike permanent employees, locum pharmacists operate in a freelance capacity and usually provide short-term cover.
A former Jhoots worker in Somerset told the BBC that the pharmacy owed her several thousand pounds.
She spoke on condition of anonymity as she fears it may impact her claim for payment.
She said the payments stopped in January and despite contacting Sarbjit and mails to the HR department, her dues have not been cleared.
She claims she has been struggling to pay her bills. It has also taken a toll on her mental health.
At the pharmacy she claimed they had to deal with angry customers due to inadequate stocks.
In Wiltshire, Swindon South MP Heidi Alexander is promoting a petition calling on Jhoots' bosses to act after a branch in the town closed.
Another MP from North Somerset Sadik Al Hassan has taken up the issue and said the patients were struggling due to frequent closures.
He wanted Jhoots to give up its NHS contracts for outlets in his constituency, and urged the NHS to take a more proactive role.
Several branches have allegedly been unexpectedly closed for reasons including a lack of pharmacists or, when they did open, had low stock.
Four out of five branches across the Isle of Wight have reportedly been closed in recent days.
Meanwhile, Manjit claimed that the branches he operates remained functional, and he operates independently from Sarbjit.
