Firstly the partition done by other two brothers on their own without consulting your family members is illegal and invalid.
Next, the landed property to an extent of 4.5 kanal already transferred vide a registered gift deed by one of the co-sharers cannot be unilaterally retrieved by the donor without following the law in this regard, i.e., without obtaining court's permission to cancel the registered gift deed and any such act is illegal and invalid and not binding on the donees.
Next, the Tahsildar is not an authority to make partition and execute a partition deed for the property that belongs to you people. She cannot have any say in it and she is not an authority for partition.
Under the above given circumstances, you have to approach the civil court seeking partition and separate possession of your share init considering good and bad soil as well as to declare your title of the gifted portion of property.
The land revenue department has no role to play in the civil dispute, you cannot get any justice from the corrupted authorities.