Defaulting payment by Cayenne Kyalami

I sold my motorcycle back to Cayenne Kyalami, with a sales contract signed at an agreed price and settlement date. Settlement was due on 28 October, and after my pleas and requests for payment, as well as threatening with more severe action, still no payment on the 8th of November. All my emails are flagrantly ignored and no idea of a settlement date is in sight. I will NEVER deal with a business like this in my life again. Good luck to those of you who want to deal with them.