If you have any more problems I'd write another letter with something to the effect of "I would appreciate anything you could provide me with for my inconvienence to increase my customer satisfaction which is currently waning." Put this somewhere near the end of the body of the letter and it may get you a discount or something along those lines. In a similar circumstance it got my grandfather a $50 credit after twice recieving the wrong trolling motor (he wanted a power stowing one not manual, for his back).

Tight lines,
Wade