MIM Solutions interview questions

tl;dr I accepted an offer the company sent, but later they revoked the offer without giving any reason nor feedback. One soft skills, coding questions and on later interview some theoretical ML questions. After the final interview I was sent an email with the offer, I accepted it, and so declined other recruitement processes I was going through. Then, two weeks later, I received an email saying: "After additional analysis of the current needs of our team and the organisational plans of MIM Solutions, I regret to inform you that unfortunately we will not be able to offer you cooperation." Just unprofesional and shows lack of respect.

I was approached on LinkedIn regarding this role. I agreed to talk to them to find out about their projects to see if it could interest me at all while the possible compensation could potentially justify changing jobs. Despite having a lot of seniority and successes in this field, instead of focusing on what matters (my experitise), I was asked by the recuiter to do a school programming task (ca 30 mins) which was unrelated to the role I agreed on talking about (data science & ML != basic python programming). Meanwhile, the timeslot for interview ended and my questions remained unaswered. In the end, I was given a "no" without any justification / further feedback. To conclude, the culture seems to be lacking at this company, at least in the recruitment process.