Thought i'd give Sainsbury's a try this week as they have things on my list Tesco does not. Bollinger champagne was on offer I noticed so ordered a bottle for Christmas, was not told my Bollinger was unavailable at the door so my husband accepted the Laurant Perrier which was sent.Not happy I began to look into things, yes an email had been sent to me but being new to Sainsbury's I didn't realise the delivery driver wouldn't advise on this as they do from Tesco. Not only did I not get the champagne I ordered but it was still showing online as available but not on offer.The Laurant Perrier they sent was full price and differed in value by just £5 from the Bollinger.However after looking online again I noticed the Laurant Perrier was also on offer that evening and £10 cheaper. So not only did I not get my Bollinger but had been charged the full price too for an inferior product. All my fault apparently for allowing a substitution, not theirs for running out of stock just when they were picking my champagne, or just before the other champagne was going on special offer. No I didn't believe it either, I can smell a rat too. Was seriously thinking of changing from Tesco's but at least they honour their special offers, so I will be staying.