My name is***** will assist you today with your issue.
I have found this bags for your machine, really I hope that this bags should be compatible with yours.
I will provide the link: http://www.bueni.es/casa-jardin/bolsa-de-envasado-al-vacio-para-envasadora-cf301_6aa07fb4dda2ed225ad903ca58d8a1bd_47759407
If you see the picture, the machine is the same than the model 300.
Unfortunately, I haven't found other bags, only generic bags in amazon: http://www.amazon.es/FoodSaver-FSR2002-I-065-Rollos-envasado-peque%C3%B1o/dp/B004APAHCW/ref=pd_bxgy_k_img_y
There are more sizes, you can see it in amazon.
Then, with your provider you could make a claim againts them, as you know, in spain the law give to the constumer 2 years of warranty, and if the machine is not complete you could make a claim for it.
The first step is to make a claim with this model: http://www.eyeonspain.com/spain-magazine/libro-reclamaciones.aspx
Until you leave this webpage, please don´t forget to apreciate my services, thanks a lot.