i'm sure Frank at CRC has chuff all else to do other than read your emails.
i think you should maybe give it a rest and chalk it up to experience. people like you who complain and stamp their feet at the slightest little thing really grind my gears. if your lucky you may get someone fired or in a lot of trouble over a £4 roll of tape – which is nice. should have bought something decent in the first place – or, as you said, read the reviews that mention the length. proper internet buying fail.