I originally went online shopping to make use of the £12 off voucher code.
I put in an order for £25 (the minimum amount for delivery) and tried to use the code.
It came up with an error message.
Then I noticed that they were charging me £6.95 for delivery instead of the £4.99 I'd been expecting.
I looked on the site to see why they were charging me almost £2 more for the delivery.
This is where my maths went wrong.
The page said that because my shopping wasn't over £40 the delivery charge was higher.
I added more things to my shopping to make it over £40.
The delivery charge was back to £4.99. Goodo!
I tried to use the voucher code again.
No go again.
I read the terms more carefully and it said that the voucher was only valid on shops over £80!
Basically I've spent an extra £15 so that I could save £2!
Maths has never been my strong point! lol