1. Whether your brother liked you or not hardly matters since te law does not specify that for being the legal heir, once shall have to be loved by the title holder of the property and in the instant case, you along with your other siblings, if any, are the legal heirs of the property of your brother who died intestate.
2. However,is the sale deed shown by them a registered one? If not then it has no legal value.
3. Conduct a search at the local Registrar's office and collect the certified copy of the said sale deed to cross check its authenticity. If there is no such record at the Registrar's office, then there is no such sale deed.
4. If there is entry in the record that the saie dale deed has been registered by your l;ate brother, then you have no role to play any further in this regard.
5. If you find that there was no such sale deed, then file an eviction suit against the said illegal occupant claiming ownership of the said property of your late brother through inheritance.