That's ridiculous that Céline only repairs a bag that is less than 12 months old! But I agree that you should bring the inner pulley tab to the front, at least it would look like the old one.
I hope for the best for you... I know I would be pretty distraught if the front zipper fell off without my knowledge! And I thought the first edition of Luggage are the sturdiest, I better be more careful with mine.
If you have one of those Céline furry fox tails, maybe you can have that as a very fancy zipper tab! Do update us if you are able to find a suitable place to get it fixed. I really think Céline should give you another tab! Bring it up to the main office in Paris as supposedly repairs/bag parts come direct from there.
I have already contacted Celine via their website and I am waiting for a reply.