Loyal Client the Past 15 Years, Now THIS!!!

I have been with Cell C the past 15 years. Spending on ave R1000 per month. I have 2 contracts. One is due for upgrade in Oct, other next year. I had several problems with my galaxy S4, phone freezing, switching on/off, battery just dies. I phoned in wanting to know if I could upgrade both lines. Agent half laughed and said they will definitely not look into it. He mentioned I could have dropped the phone, and recommended me to book the phone in. Then I will be without communication for 4wks. Great service Cell C. I asked to speak to a manager or be placed through to the CEO office. The agent could not transfer me, and said someone will make contact. I am still awaiting a call. Guess my loyalty after 15 years means nothing to them. Wonder how will I be treated/greeted by Vodacom or MTN.