Dear Mr. Wang
Thank you for choosing our company two months ago.
I am very sorry that mistake we had make. I am the sales manager of our company. I have looked into the problem that the ink on the label is not waterproof because of our reckless. We have decided to recall problem products and send a batch of qualified products according to the original price by 80%. I hereby express my deep sorrow for this matter and we are going to do our best to make it up to you. I assure you that this mistake will not happen once again.,
I hope that this solution is acceptable and look forward to hearing from you. I hope to continue our cooperation.
Once again, please accept my apologies for the inconvenience this has caused. Yours sincerely.