Chippenham Magistrates Court heard that HSE served four Improvement Notices on Rapid Hire (Swindon) Ltd last October.
But when a safety inspector returned to the company three months later he discovered that dangerous practices were continuing and three of the Notices had been ignored.
Rapid Hire, of 14 Devizes Road, Swindon was found guilty of three separate safety breaches and was fined a total of £800 and ordered to pay £1,215.95 in costs.
Speaking after the prosecution, HSE inspector Ian Whittles said: “Rapid Hire blatantly ignored warnings and the Improvement Notices served to them, neglecting its duty of care to its employees and customers.
“Even though there were no reported incidents, serious safety breaches continued and these could easily have resulted in serious injury.”