[Resolved]  Croma — I am complaining about wrong data entry in your portal

I have purchased a earpod on the opening week of Croma centre at Dehradun, as being a fascinating and have trust in the name TATA.
Now yesterday I visited the store to purchase refrigerator and selected one and opted for the option of Bajaj Finance, as I am holding its preveilag card and want the product on EMI. All documentation was done and my loan was also approved.
But the manager informed that I am not eligible to purchase the product from Croma as there is mismatch in the name entered in your portal is different from from what my legal name appears in the loan document.
Legal name: Manjeet Singh Kohli
Name in Croma: Manjeet (first) Singh (last)
I came to know on that while billing on my first day purchase, your employee entered the name in that format which cannot be changed and not even the mobile no be altered.
If Croma is so serious and find important for whatever reasons, the changes are not possible then should be extra vigilant and well inform the customer at time of billing and entering the details in the POS.
Yesterday I faced lot of inconvenience and felt hurt and humiliated for not able to buy a product for mistake which I have not done.
Due to this fault done at the store end, being a customer, it is I who have to complain and request the call center, email and doing this correspondence.
This is really turning bad and sakes me for all the trust I have in TATA.
Please suggest on how to rectify the same as by canceling my loan effect my Credibility.
Regards
Manjeet Singh Kohli