Ink Cartridges

Having just opened a new multipack Canon Pixma 540/541 ink cartridges (1 black/1 colour), I now realise I've ordered the wrong ones.  Duh!  They're brand new and I can't use them in my printer.  I paid £19.40 for them from Amazon (and in an ideal world would like a little donation towards them) so if anyone is interested, please reply to this or call me on 07507 138 582. Have put this in Share/Give/Ask as not sure what category is correct. Thanks. Kit