Customer Service of Dubai Call center needs to Improve

I think there are many things which we dont like here,I am surprised to see attitude of customer service executive.Normally I avoid calling any call centers in morning due their unmannerly behaviour.But today morning I had to call Du as I changed my handset & they were sending me msgs at 2.00am or 3.00 since two days.That lady was telling me to remove sim & put it back,I nicely told her maam I have already done that.She asked me when you did I said yesterday afternoon,& then she is telling me do it today I said what diff it will make.I told her see even I think you should speak to somebody in technical department,or you should look into matter instead of suggesting me something which I have already done.She started screaming over phone,& said this is the problem with you all,you want us to help you but dont want to do what we are telling you.I really got hyper,& told her you do not deserve this job let me speak with your Assist or supervisor,rudely she said I can not transfer your call,Then I said ok..at least forward my request to your Technical dept.She gave me a stupid reply like,ok I can forward your request "BUT YOU HAVE TO GIVE ME YOUR FULL NAME":spinI said so am I scared of giving my full name it's your duty to ask.She took my details & very rudely said Nationality I proudly said INDIAN.she didn't say goodbye phrase too.
This conversation really upsetting..& on weekend my mood is totally off..not feeling like talking to anyone.