My work collegues have given me some baby stuff, its 0-3 and I have so much (25 baby grows!!!) in that size, plus one is a big puffy all in one - not so good for a summer baby. So I want to take them back and exchange them for larger sizes, but I don't have a receipt, not even a gift one. Its ASDA and Mothercare. Do you think they will exchange them for bigger sizes without a receipt? I am a woose at things like these!!