How NOT to treat a customer

I've now had a Cell C account for 5 years. Always payed, always up to date. My CCard details changed and Mweb had the decency to notify me. Called them and sorted out a new debit order - simple, effective. Called CellC and changed the CCard details (BEFORE they had notified me) and updated and then proceed to get a myriad of *****y sms's cause THEY have failed to redo the debit order!!! Just called in and had the agent take issue cause I said they were *****y messages. What? Are they messages of love and adoration? ***? You are the agent of the company, if I choose to be expressive I have that right, if I were taking on the person then yes, get offended, but I have freedom of speech and if I choose to embellish cause I am this frustrated with idiotic service, then that is my right. I knew there's a reason I'm moving my contracts over to TelkomMobile. At least they offer better deals. Now lets see if her team leader actually contacts me which I very much doubt!