I have a jacket I LOVE, but it's a tad tight and I would like it to get altered a bit bigger. I hear Chanel does alterations, but I'm not 100% so I'm asking you. I would only want Chanel to do it because I want it original and 100% Chanel rather than an outside tailor using her own thread, etc. Sorry I am picky about this, but this is my preference. Thanks.