Dineth

Hi Everyone, I own a 19- Mazda 323 Familia (BG3P) which up to now gave no trouble, I've been using it for almost a couple of years. However, now I'm facing a couple of issues. Issue1: When changing gears, the g'box makes a sound and some times I'm not able to even change gears. Should I be looking at replacing the gearbox? or is it repairable? Issue2: The AC compressor makes a very irritating sound which disappears when accelerated. Please advice. Thanks, Dineth