Contacting Sainsbury's

Last week I went to the Sainsbury's in Richmond as it is the only place in my area where I can recycle drink cartons. When I got there, the recycling centre was drowned under plastic bottles because the plastic bins were full and people had been dropping their recycling next to them. I put my cartons in the proper bin (which wasn't full luckily) and when I came back home I decided to contact Sainsbury's and complain. I found the contact form quite easily on their website and filled it in, half expecting to get a half cooked excuse in response. But no, to my surprise I got an email on the Monday saying they had contacted the store's manager and they were emptying those bins every day. I even got the details of the manager so next time I go there, I can theoretically talk to him directly if need be. And then later this week I got a £10 Sainsbury's voucher through the post! Could it be that Sainsbury's are actually listening to their customers? I shall see next time I go if the plastic bottles recycling bank looks better maintained. And I shall spend my voucher.