Unacceptable behavior and unprofessional service

If I could, I would rate ZERO stars. I purchased my vehicle last year and set a debit order on my account, which goes through monthly. The debit order has run with no issues, and I've had no returned / unpaid debit orders to date. I got a call from their collections department this afternoon stating that my account is in arrears as the debit order was returned, so I must make alternative payment methods or I'll have a bad debt record to my name. Firstly, I have never had a bad debt / outstanding / non-payment against my name and always made sure my debts are settled in time. To have a financial institution contact me 1 day after the debit order went through and tell me I'm in arrears without allowing 2-3 days to go by, ensuring their payments are received is totally unacceptable. My debit order was deducted successfully, as it usually is, with no issue. To have a call center agent contact me, making me feel like a ********, is unacceptable. I had to cut my work meeting short to contact the arrears department, of which I spoke to 'Sherika,' who also could not assist me and transferred me to their collections department. I had to hold on again and re-enter my details before being transferred to a call center agent. Again she asked me for my ID number, which I had keyed in to access the call center, and when I raised my voice, she suddenly could not hear me, so I ended the call. Companies calling out of desperation Ecos concerns that your business is running into financial difficulties as you find it appropriate to contact YOUR CUSTOMERS in such a manner. I expect a written apology and will be taking this issue further.