Bravatek Solutions Inc (BVTK)

[shotsky]

The company doesn't get 'all that cash' at once. It is spread out over the time the contract covers, and is paid periodically, probably monthly. 'All that cash' should go toward retiring debt FIRST, and paying onoing company expenses so they can QUIT BORROWING.
Once the company is profitable, as shown in quarterly filings, it can consider buying back shares with profit. You don't borrow money to buy back your own shares.