英语翻译非常抱歉的通知您,因为我们这次采购的铁桶中有两个桶出现了质量问题,表面严重不平整,并且掉漆.不符合产品包装的要求

Dear valuable customer
Regarding the product ***,PO ***,sorry to tell you that please change your order to 37 barrels (7030 KG) because of the following reasons:
●2 barrels are deformation and shortage of paint from our vendor,this will affect packaging.
●These barrels are specailly ordered from the vendor,if I wait for 2 more to exchange the defective ones,we can not meet your defined delivery date.
Sorry again for the inconvenient we caused and I am waiting for your reply or your suggestions.
Best regards
XXX
备注：1 开始应与客户说清楚是什么产品,什么订单号.
2 不良的桶肯定是要你的供应商交换,而不是追加订单.
3 最后是等待客户答复是否同意.
4 如果不同意更改数量,再协商是否更改交期,或是否与价格等相关.