Worst Medical Aid company Discovery Health or Discovery Wealth (only after Money)

In 2017 i was employed and the company paid 100% of the medical aid, the company then terminated my contract 2 months later after i had gotten my contact lenses, In 2019 i was called by their collection agency informing me i owe them R2500, you mean to tell me it 2 years for them to realise this and my thing is the company is the one who did not pay them not me. Discovery is a waste of money and time and i hope never to do business with them again.