Thanks for leaving a review and apologies that we didn't meet your standards. On rare occasions, things do go wrong, we're only human.
I take exception to the suggestion that emails were ignored. This is untrue. Your first email was at 8pm on a Sunday. You recieved a response on Monday morning at 10:30am. Subsequent responses were dealt with where neccessary, the email we recieved in response was a statement; there wasn't anything to action. You then sent a response on the 14th March at roughly 8am and got a response at lunch time the same day.
The page for the 'buy 2 get them half price' offer states 'Metabolic Tonic buy 2 get 50% off!' at the top of the page. You also get the chance to review your basket before placing the order and then again when you check out. In gerenal, this is a good idea as with websites as errors can happen.
You mentioned the issue wasn't acknowledged but it was and we(me) contacted our web agency the same day to find a fix, it hasn't happened yet but we understand. It automatically crosses out the price in reference to the offer and I see where this could cause confusion but that's why the notice is towards the top of the page.
You say there wasn't a refund offered but there was and I believe it's been processed - it's possible this review was posted before that happened, I'm not sure how long they take to process as it's not my dept.
I completely stand by our customer service team on this issue, we're very lucky to have the team we do and they're exceptional at their jobs. At the same time, I understand a degree of your frustration hence the refund and conversations with the agency in an attempt to rectify the issue.