Cancel the contract

Hello peter

I recently bought a new car at nissan autocity heildeburg branch ,those guys a doing everything just to make a sale .

They app**** for finance for me i explained that i ddnt want a ballon payment and they agreed came back to me that i was approaved and told me what the installment was i refused and told them its too expensive to my suprice they called me bqck and sais they spoke to management to agree to give me a discount to what i wanted to pay . Little did i know that they app**** for ballon for me with out my consent and signed the application . I ve called countless time to cancel the sale/contract and they hang up on me and say i must discuss with my bank . Am still with in the 7 days cooling period which means the car still belong to the dealership , bank said i must ask the dealer to send the cancellation form and the dealership doesn't Want this is frustrating and i want to get out of this contract with this schemer