Better deal available 3 days after installation

Hi all,

Just had the Volt (without SIM) package installed on Thursday at a cost of £84.99 with £50 bill credit. 

I am disappointed to see that Virgin are now offering a ‘Biggest Combo deal’ which is everything I have just without the Volt branding, and it is £76.99 with a £250 bill credit! The Biggest Combo was not available when I initially signed up, otherwise I would have selected this option.

I am a bit miffed, and I am just wondering if it would be better to exercise my 14 day cooling off period to cancel? I am paying an extra £8 a month for the same package just under a different name!