As a first time used-car buyer i had horrible expe...

As a first time used-car buyer i had horrible experience with mcdavid frisco.
i am very disappointed with finance manager who processed my sale.
during our discussion i have clearly said NO to GAP-Insurance. but he included in the sale without my knowledge .
We never discussed anything about Resist-ALL package but he added it without my knowledge. i have no clue what this stands for.
he asked me to sign many documents saying they are for loan process . he didn't explain me what each document stands for.
on the day of sale he didn't reveal me the final number . i was told that EMI would be x amount for 60 months term but in actual its was for 72 months.
he deliberately made sure that i am not aware of the complete sale details.
when i came home and after three weeks i shocked to see actual sales details from honda finance.
i personally went to the store and gave request to cancel gap insurance and resist all package on November
but he didn't cancel them . Every time when i call he says the same same thing, "your request is put it will be done in 6 week".
i was really frustrated with their response. but someone accepted request around march then they cancelled my gap insurance .
but still "resist all" component is not reverted from my account.
because of all these issues i was not able to refinance even though i got better interest rate from other banks.
so i am ended up paying extra money for service the which didn't request and higher interest rate.

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update 11/10/2020 :
I never got a call from the dealer . i tried to reach ali benli several times on the number commented below but he is always unavailable.