This Acer delay problem as been aired on many occasions within the forum, and things do not seem to be getting any better. The supplier is the main point of complaint, and it is their duty to comply with consumer law. The manufacturer warranty is only an extra service, which can prove very good in some cases by sidestepping the supplier for a direct route for a quicker repair. In Acers case this doesn't always seems to work.
Did you contact the supplier originally about the faults that you have had, or did you go direct to Acer. If you did contact the supplier originally, what was their way or views of dealing with the matter!.
For your legal rights under consumer law click here or you can contact click here or your local trading standards for further advice.After six months things can get a little more difficult in pursuing a fix for any problems, hence my advice to contact the relevant advisor's.