Rude call center agent and unclear communication

I've received an sms advising that my payment is due on the 2nd of April and today I received an sms informing me I have to pay today to prevent a handover. I called the call center today and the lady I spoke to was extremely rude, only emphasizing the fact that i need to do an immediate payment. I have only missed one payment because i was planning on settling the whole amount in April - Which is what I usually do,. Missed only one payment of R140 and I am treated like a ********. The only reason I called was to get clarity of what the "handover" was about, i did not anticipate the type of service I had just received and she even said her goodbyes before I was even done. I'm told to pay a certain amount next month, then all of a sudden I am threatened to being handed over when the date stated for payment hasn't even passed. Skipping a payment of R140 for just one month has made me feel like a ******** - no where else have I experienced this.