Hi guys, I was hoping to pick your brains and get some advice regarding a problem competitor. I run an ecommerce business. This individual has been trading since before my company. Obviously they've taken my entrance to the niche extremely personally, and have a vendetta against my company. A couple of years ago they threatened to "crush" my business if I didn't stop undercutting their prices. They said they could go way lower than me. I took the chance and ignored the message. Fast forward a couple of years, and they emailed me again back in June (2014). This time, they accused me of selling products too cheap and said I was destroying the market, and that I was severely limiting choice for consumers. To that end, I must put my prices up to the same level as theirs or they'd report me to the supplier. Again, I didn't bother responding to their message, and sent a copy of it to the supplier for good measure. Today, my company receive our first terrible review on Trustpilot. I always like to look at bad reviews objectively in order to put procedures in place to ensure these things don't happen again. When I looked at the order I noticed the address looked familiar. The postal address for this customer is identical to the trading address of the individual's company who has this vendetta against me. The review was fairly defamatory in its nature and I've reported it to Trustpilot. Clearly this individual's outbursts are becoming more frequent, and presenting more of a headache to me each time. I wish this person no ill at all, I just want them to leave me and my company alone. For whatever reason they've taken our success very personally, which is obviously regrettable but not really my fault. I barely have time to scratch my buttocks any more, I certainly don't have time to deal with this person's attacks. Surely focusing their energy on their business would be much more productive instead of trying to cause trouble for me. The simple fact is, in two of their messages they've tried to blackmail and threaten me into price fixing with them - which is illegal. In the public review they wrote, they've written various defamatory things, and made assertions that are factually incorrect. What would be the best way to go about telling this person that I mean business? Engaging a solicitor? I really don't know. I hope someone can help, thank you in advance!