Levi's India — wrongly altering at store

Address:

211001

Very sad to inform you that iv brought a levi's denim 501 and given alteration size was 36"5 but strong tailor had wrongly altered 36"5 and the other length is 36" 2
And now i'm not at all satisfied with altered length.
I have left the denim at allahabad levi's store and available staff was full of attitude and ready replace the denim 4200/- rs is nothing i cannot take this attitude from your staff
Will surely submitting this case to consumer forum. Please do the needful asap before i take any step against the given product and staff.
It's been 2 days i'm running for my purchased product