I have a complaint to make. 我要投诉
complaint是complain的名词。 complaint的t要失爆
be badly treated by.. 被..无礼对待
badly的d失爆, treated的第二个t弹舌
we're sorry to hear that: 听到这事很遗憾/抱歉
may I have your ... 是一个礼貌性的问句。
deal with the matter : 处理这个事情
with the中的第一个th失爆
I have to apologize for that: 我为这件事致歉
I promise it won't happen again:保证不会发生
t 要失爆, happen again要连读