We are sorry to hear about your experience.
A minor repair clause is for the maintenance of the property due to wear and tear and not due to the tenant's negligence. These include the flooring, interior plaster and other surface materials, doors, windows, locks and furniture. The tenant shall pay up to $150 per item while the landlord bears the exceeding $150 per item as stated in the invoice.
In this case, if the wear and tear damage is caused by a cleaning company then it has nothing to do with the tenant's negligence,
Also, the general rule is that a chattel (an item of personal property which is movable) always remains the tenant's and is removable by him at the end of the tenancy, whereas a fixture is the property of the landlord and the tenant has no right of removal.
In this case, the floor is considered a fixture and remains the property of the landlord. As such, it is also the duty of the landlord to repair it to keep it structurally sound if it is not due to the tenant's negligence.
We advise you to document the floor by taking photos before the cleaning and after the cleaning as evidence and for the handover of the property to prevent any disputes.
You may approach the Singapore Mediation Centre (SMC) or Consumer Association of Singapore (CASE) for rental disputes. If all else fails, you can approach the Small Claims Tribunal (SCT). You will need to present all documents such as emails, text messages and Tenancy Agreement when presenting your case.
Hope this answers your question.