Business owner called me a slur when I blocked his WhatsApp number

I asked for a quote on a month by month subscription. I didn't respond and the person continued to message me. At the end of the day I blocked the number. The person. Messaged back on a new number saying: You're a *****.

I blocked that number and he immediately messaged back to say: how much you charge ***** And I have 50 more whatsapp *****.