I am not sure why a stylist would tell you that your perm would disappear after only 2 days. It all depends on how curly you would like your hair. Most salons now would look to give you quite a soft wave which, if you have thick, heavy hair, would not seem to last you very long but I am sure it would last you more than 2 days! If you have long, thick hair it does tend to pull your hair down! It may be worth you having some layers through your hair to get rid of some of the weight and allowing your hair to curl or wave. I think what would be a good idea to have a look on http://www.ukhairdressers.com/ style/style.asp
and see if there are any styles that you would love to have. Print them off and take them along to a salon and ask how you could achieve the look! I am sure you will be able to have a fab new look!