Customer service issue.

As a new customer, I would like to report two customer service reps both black women, one named Sam for their rude behavior towards me. While setting up an account giving the rep my name, spelling each letter for clarification, she made a high pitched tone come on the line while waiting for her to type my info into the computer. This loud noise was unbearable to sit and listen to fir even two seconds. So, I had to hang up the call. Sam then called me back explaining that I had to listen to that while she entered my information , how rude and disrespectful. What kind of business does this to customers?Sam called me back a second time stating that she cannot keep calling me back, which was extremely RUDE of her. It's her JOB to call customers back after being disconnected!!!  Then I spelled out my name to her, obviously she was angry and took offence that I spelled the letters out to her. She then asked which name is first, which is common sense. Sam chose to mock me by using my last name as my first name in a derogatory way which was intentionally malicious.  Then she proceeded to ask me for my credit card number and security code for a onetime payment for tech installation of the modem. At this point she was condescending and talking over me to the point where I could not speak, so I ended the call. After calling back Xfinity Comcast, another rep explained to me that they are not allowed to ask for private credit card information. Being that my credit card could now be used as revenge and possibly theft by Sam, I am now am forced to cancel my credit card and get a new card , even before becoming an official Xfinity customer.  This is totally unacceptable behavior of a Comcast representative. The second rep lost her patience with me and hung up the call after trying to set up my acct reloading the information page three times.  Then to have the audacity to blame me for taking too long to insert my information then to hang up on me.   After speaking with a third rep who is a 16 year employee  with Comcast she explained that this was actually a technical software issue with Comcast changing over from an old system. I'm totally flabbergasted at the rude customer service reps at Comcast. Management needs to do some housecleaning to say the least.