I'm not normally one to advocate sending a watch back for the more niggling flaws, but this sounds like it has enough niggling flaws to render it unwearable, so it is definitely in need of sending back. My Heritage has a quartz movement, at it's time keeping is near +/-0 per day. Same goes for the movement of my plastic submariner, which cost me £15, and was probably not even worth £5, but the thing still keeps bang-on time, so while I understand that quartz isn't for everyone (I've even had my own rants about quartz in the past) I must say now, that in all honesty, a quartz movement can be perfectly acceptable (depending on user requirements) and for it to lose time like that, well, that's just unacceptable IMHO