The biggest mistake I ever made was filling in a contact form on their website for a house valuation. Straight away I was hounded with calls. I answered in the evening asking them politely to ring me back the next day in the afternoon after 2pm and the calls started again from 9am the next day (by the same person!!). I told them to stop ringing me and that I'm no longer interested because my first impression of them is awful. I then start receiving phone calls again the following Monday, I've now had to block their number because they don't leave you alone!!