More details please.....who made it ? from where ? photos as Columbus Lugosi suggests....what material did you request? what is the material you received ?
Hopefully your choice is documented on paper. If so, back the suit goes. Alternatively, if the fabric is close and acceptable to you, perhaps they will give you a rebate.
Made to measure - probably their fault if you have everything documented. A truly bespoke / hand made suit would require several fitting sessions, and by then I hope you would have noticed the fabric being off.
You don't say where you purchased the suit. I can tell you that you can't get a bespoke suit in three weeks. I am in the process of getting one made right now & I won't get the suit until September.