Edgars harassing me for payment

Edgars was sending me statements with the same settlement amount on every month that I paid several times over (absent-mindedly). This happened 5 months in a row. When I heard of them going bank I looked at my statements and realised they'd been de*****ing me every month for almost half a year. I stopped paying. Now they've handed me over to Blake Collections agency (their bad review follows). They have been telephonically harassing me for the last couple months, calling from different numbers at all hours. I refuse to engage and ask them to refer to my email proof of payment but its very stressful to have to relive this experience every couple days. Edgars, call off your dogs. I'm taking this to the credit ombudsman regardless but you've spent the R359 I owe you many times over while harassing me. I can only imagine what Blake charges for this "service".