that is why you need to get everything in black and white with regards to what they give you. Do not get verbal agreement. Problems like "i dont know, it was promised to you by Mr A who left already", "cannot remember, so many clients" will sure to arise. Be sure to ask them to write down everything they give and get some advice from someone who is already married.

That's their way of getting more money on a package, you must be strong to resist the temptation and you need to make up your mind as not to upgrade anymore.