Bad Customer Service

I had a query yesterday regarding my data being depleted right after I recharge and I called Cell C customer care and spoke to a lady by the name of Nqobile who advised me what I need to do and even sent a step by step sms to my phone, to my surprise immediately after my call I got an sms from Cell C saying I need to RICA my number by the 30th of June as I have not RICA'd, I immediately called back and spoke to a lady by the name of Zama who suggested I switch off my phone and switch it back on and unfortunately that did not work either, I then called again and spoke to another lady by the name of Philisiwe who was very dismissive to my query and told me she does not send out smses therefore she cannot help me, when I asked to speak to her supervisor she laughed and said her supervisor is going to tell me the same thing, I eventually spoke to a supervisor by the name of Nqobile as well and advised that there is nothing they can do I need to go RICA my sim. I cannot understand how many do I need to RICA my sim as this was done before and to this number was a contract number initially, what annoys me is that how does Cell C send me an sms on Sunday evening at 7pm advising me to RICA my sim on the very same and even suspends some of my services, I had important phone calls to make as I have a couple of meetings to attend today and I could not do that. I am very disappointed in the service I got from Cell C to say the least and I am hoping to get my query resolved ASAP as I need a phone, if it's not too much to ask my I have someone who knows what they doing to call me and assist me.