Do not trust anything they tell you, there is a big gap between promises and real life. As fas as I know they just try to trick people to sign the contract and thereafter they will not remember to have made any promises at all.
Ask yourself why they hire all year long. As soon as people realize that they have been fooled they try to leave as soon as possible.
At least none of the guys I know did pay anything back as according to latvian law any kind of bond is illegal.