ErnieApp Senior Software Developer interview questions

Contacted on LinkedIN directly by the owner of the company. Initially very friendly and warm towards me, was extremely interested in getting my skills into their team and company. It seems unfortunately they don't like taking no as an answer. There was multiple attempts to sway me to moving company and joining ErnieApp. In the end, I sent a very solid no. This is not an opportunity I'm interested in. Which I had hoped would be the last I'd hear from them. This was not the case. After a few hours and much later in the day I get a rather nasty message back, which insults me and address me wrongly. Quite poor behaviour, I'm rather thankful I didn't go any further as if this is how potential hires are treated it says volumes for what the staff must be treated like.