假定你是李华,学校广播站英语节目向全校学生征求英文稿件,请根据下面提示写一份英文投诉信件：
1．我收到你们上个月的话费单后发现有些计算错误,我觉得我被多收（overcharge）了两个国际长途费用.
2．但当我打电话询问客服部门时,接电话的女孩态度非常粗鲁.一方面她总是打断我的话,另一方面她甚至说错误在我.
3．我建议对这个女孩进行惩罚,另个告诉她如何该如对待客户.我希望她能向我正式道歉.
注意：
1．此投诉信应写给电信公司（China telecom）服务经理.
2．信的开头与结尾已给出
3．词数：100左右
Dear Sir,
I am writing to let you know the deplorable attitude of one of your staff member.I received my telephone bill for the previous month from you and thought there were some errors in calculation; I had been overcharged for two overseas calls.
However,when I called your Complaints Department,the girl who answered my phone was very rude.For one thing she interrupted me continually,for another she even said that it was my own fault.Needless to say,such a way of dealing with customers is unacceptable.
I would like to suggest that the girl in question should be disciplined,and instructed on the proper way to deal with clients.And I hope she can make a formal apology to me.