Sime Darby Services Pte Ltd - #03-01 Sime Darby Services Pte Ltd

I lease a car with them for a period of 5 years. My lease is suppose to be up 2nd May but I was told to renew the road tax and insurance for 1 year as it is due on the 27th April. I do not see the sense to pay for a year road tax and insurance just for 5 days and so I choose to return the car on 26 April (Hertz do not pro-rate if I return early which is fine). After that, I ask for the return of my deposit but was told there is a massive repair cost including 2 headlamp and rear brake lights which was not really spotted when my son return the car. After much investigation and email exchange, they release one of the headlamp do not need replacement which save me SG$2,620. If I never check, I would had paid this extra amount for nothing. I ask for an invoice and prove of repair, only the invoice came but no prove of repair came. I ask for my refund status, reply is slow and the last reply I got was on 6th June saying they will check with finance. Until now, 10 June, not reply. Updates: The road tax and insurance expired a few days before my lease end. I was given a choice to return the car early as it do not make sense to pay for a year insurance and road tax but in the end they charge me rental until my expired date deducting from my deposit without informing me. Sent an email to them on 5th July and today 18 Jul still no reply.