Treated so unfairly

I recently took out a loan with Sanlam loans, my first installment was due now 20th December. I was ready for them from the 15th to this day there is money idling in my bank waiting for them but no attempt on Sanlam side instead they declared me as "The unpayer" Im getting emails and sms so yesterday i rep**** to be called back the nice gentleman picked up the fault is with them not me and promised to escalated the matter. Again today im getting a caller from collections and it triggered me to complain this time. Im very annoyed that before chasing me as a Fugitive why they didn't get facts straight? I want this sorted ASAP. Check references from Direct Axis, I've been with them for over 5yrs, not a day of default.