The correct thing to do with complaints about any hygiene issue with them is NEVER ask to see any management staff member. They will not only be non interested but will for certain know nothing whatsoever about consumer law. Go instead to your local "trading standards" initially and let them handle it. Make certain you have the correct store and ALSO your receipt. If you must ask to see the manager make CERTAIN you get his/her name, the time and date you spoke to them. If possible try to take a witness with you as it is likely it will be denied you ever spoke to them. Email their head office and DO make certain you fwd/cc/bcc to at least one other person. Their head office will not respond but the copies can help considerably as proof of contact. Aldi are a nasty company preying on those less fortunate who might have less than others and also the elderly with super fast checkouts. Try Lidl. Not much better but staff are nicer and no shockingly fast checkouts.