Inflated access fee

I joined Budget Insurance when I purchased my VW Golf 7,and I was informed telephonically that my access will be 2500, when I claimed, however on 19 June 2015, I had an unfortunate incident whereby my car bumped a cement pave and damaged the oil samp and when I called to lodge a claim, I was informed that my access will be R8130 as I have only two months insured with Budget. The dealership gave me a quote and the cost of the damage was R3300.I then cancelled the claim and incurred the cost of the repairs. I Would appreciate if I can be reimbursed the difference of access agreed upon when I joined the insurance.