A calque wouldn't take such a particular word as "oi". The sentence makes sense coming from oral language, where you say oi to ask for confirmation and add the

A calque wouldn't take such a particular word as "oi". The sentence makes sense coming from oral language, where you say oi to ask for confirmation and add the rest to specify in which direction. People do say "eh que sí", which, cal que or not, follows the same pattern, and even "a que sí", which definitely copies the Spanish expression.