Harassment by MRP Financial Services

Have been a client for the past 30 years (since Topics). I have never skipped payment in fact I would settle my account in full within 2 to 3 months. I bought end Feb 2019 on my account at Garden Route Mall in Georhe, when I received my account end March there was banking details for payment. I contacted them and received the details. I proceeded to pay MORE than my installment. Then the harassment started, threating emails etc. I forwarded my proof of payment to both pop/statement email addresses provided by MRP Financial Services. They do not respond to my emails nor that my account has been rectified. I also requested that they confirm their banking details. They insist I drive 70km to go into a Milady store to present them with proof of payment - really?!! Get your act together or start losing loyal custoners - this type of treatment of customers should be reserved for *********.