It really is tiresome when people nitpick every little thing to try to score points. If you doubt the veracity of a post report it.
As I read it... Op did shopping, put it through a manned checkout, packed the razor blades (which come with a security sticker) as they were passed through by the staff member, paid and left the checkout.
As she arrived AT the first of a set of double doors the alarm sounded. She moved back in case it was the person adjacent to her, but when she moved forward towards the doors for a second time the alarm sounded again.
Still without leaving the store the Op approached a member of staff, advised that the alarm had sounded and suggested it could be the razor blades because, as a regular purchaser of them, she is aware they have a security sticker and she has previously experienced a failure in deactivation (as have I).
Staff member then goes through the Op's shopping, taking items out of bags, until the razor blades are located in the middle of an otherwise fully scanned shop. It is noted that they were not on the original receipt so the Op pays for them. She then leaves the store. Her previously bagged shopping partially unpacked in her trolley from where the staff member and Op searched to locate the offending razor blades.
At the point the Op left the store everything in her trolley was paid for. However she was followed to her car by six members of staff because there were unbagged items in her trolley. This was despite her returning when the alarm sounded, having her shopping checked by a staff member, the error in scanning identified and payment for the item being made.
The Op had her shopping gone through before she even left the store. Everything was paid for. To then be followed by six people and having them prevent her getting in her car, being called a thief, being asked to open her boot in public, for the end result to be all shopping present, correct and paid for. The message from a member of staff was that the manager still thinks she's a thief.
I'm astounded so many people struggled to comprehend what essentially is a relatively easy to understand piece of writing.
Incidentally it doesn't matter which member of staff said she was still thought of as a thief - a representative of that company, regardless of who, made that comment.
I have had many things refunded onto a card. I have NEVER been asked to hand it over since chip and pin came in. They can see the card number on screen to match it. Haven't had my signature even glanced at in years...
Oh, and if the adverts are to be believed Tesco do now refund or exchange food, including perishables, for any reason, including change of mind.