Nissan Motors — overcharged by laksha nissan, mumbai on accessory installation

Address:

Laksha Nissan, Govandi. Mumbai, Mumbai City, Maharashtra

I installed side steps on my new nissan kicks from laksha nissan, mumbai. Gm sales kamlesh & sales executive sumit charged me rs.22000 flat for the installation. They didnt provide me with any detailed receipt/invoice of the side steps on the day of purchase which was 04th july, 2019. I checked the price of the same part on google nissan india accessories and i saw that the same accessory is for rs 18000 including labour charges. After reminding them about the invoice several times, sumit sent me the invoice today which states the price of the side steps is rs 18000. I felt cheated as this is a wrong business practice and completely unethical behaviour from nissan as a brand.
I hereby request nissan to take strong action against this kind of malpractice as nissan is a brand of high repute and its employees should not indulge in cheap tricks with its customers.
I look forward for a refund of rs 4000 which were charged extra to me.
I have attached the 2 seperate invoices which states seperate price of the side steps for your better understanding.
Feel free to contact me on my mob no - 91 [protected].
Sachin topkar