the breeder has been wrong in the way that she has lied about what exactly i was buying but even though mango is a LH EXOTIC she is a persian to us ( especially as there exactly the same looking )
The breeding programmes for Longhairs (Persians) and Exotics are often run in parallel, with Longhairs used in breeding Exotics to maintain type.
What you do need to keep in mind, is that the gene that produces long hair in a cat is recessive, so it will only breed true when you mate Longhair to Longhair. Exotics are bred by mating either Exotic to Exotic or Exotic to Longhair - as the gene for shorthair is dominant, the kittens of an Exotic to Longhair mating will always be Exotics although genetically they are heterozygous i.e. they carry the gene for long hair. From what I understand, the latter mating is still the most common and if cats from these matings are then bred together i.e. heterozygous Exotic to heterozygous Exotic, you will have a ratio of 3 Exotics to one Longhair in the litter of kittens - and two of the shorthair Exotic kits will carry the gene for long hair.
To quote from the Exotic Shorthair Cat Society webpage on breeding (
http://www.exoticshorthaircatsociety.co.uk/breedexotics.html)
"Longhair (Persian Type) cats should be used as an integral part of any breeding programme in order to maintain type, conformation and quality of coat." The longhaired exotic variants (like Mango) are still registered pedigrees, but they are placed on the GCCF reference register and cannot be shown. They can however, be used as an integral part of a breeding programme from what I understand. The same issue applies to some other breeds e.g. Selkirk Rex.
If Mango is registered as an Exotic, her breed number should be 70.xx - most likely 70.15d (red self) or 70.19 (red tabby) from what I can tell. If you have her paperwork, you should be able to find this out. If she is a Longhair (Persian), her breed number will be in the low single or double figures depending on her exact colour / pattern.
Though to be honest, if what you bought was a pet quality kitten (not for show or breed) then it truly doesn't matter whether she is an Exotic or a Longhair, since as I've explained, Persians and Exotics are part of the same breeding programme anyway. However, when you do go and visit a breeder, it is your responsability to ask the right questions about the cat / breed you are intending to purchase, but if you were sold an Exotic variant as a Longhair, then you really should take it up with the GCCF (or FIFe or TICA if relevant).