Zaripov concluded an agreement with the administration

Zaripov concluded an agreement with the administration of the Lokomotiv stadium, according to which his team pledged to put in order the football field. At the end of the work, Zaripov demanded that everyone be paid remuneration for overtime work. However, the administration refused, citing the fact that although Zaripov was listed as a foreman in the contract, the composition and names of the brigade members were not indicated in the contract.
How to resolve the dispute? What is the nature of the relationship?