Journal review failure
This sounds like an incredible botch-up, to the degree that it has me seriously questioning whether the journal you submitted to is the one that you believe it is.

Most reputable journals now use paper-handling and review systems that are highly automated, such that it would be extremely difficult to get a paper attached to the wrong reviews (like, beyond incompetence and into active interference with the systems). One reviewer sending in the wrong review I can see---two that are clearly referring to the same wrong paper is unlikely to happen unless something much deeper has gone wrong.

At this point, the appropriate course of action is not dealing with this handling editor any more, but escalating to the editor(s) in chief (EIC).  They should be responsive and able to sort this out quickly.

If you do not get a satisfactory response out of the journal leadership within a week, I would start to wonder whether you are really dealing with the journal that you think that you are. The behavior that you are describing sounds more like that of a predatory publisher: sometimes journal websites are hijacked or reasonable people (like your colleague, assuming you trust them) are tricked into supporting predatory enterprises with names designed to sound almost identical to reputable ones.  It is also the case that journals, like any other organization, sometimes collapse and fail, and it is possible that you might be witnessing the last stand of a formerly respectable institution.

In any case, if you don't get a satisfactory response from the EIC within a week, I would suggest withdrawing your paper and sending it to a different and more trustworthy publication venue. But first, if your field allows it, publish a preprint somewhere like arXiv as a precaution against possible plagiarism or refusal to accept your withdrawal.