Two different issues: free & fair. What you describe (ballot stuffing & voter intimidation) could make the vote not free, if they were widespread, as would banning of potentially successful opposition candidates or parties, or dishonest vote-counting.I am not disagreeing on what he has done, I am asking a simple question, is the integrity of the vote in question or not? Was there ballot stuffing and were the voters threatened in any shape or form? If the integrity of the process is not compromised, then he is legitmately elected. I have not heard EU complaining that the vote was unfair. Have you?
Erdogan effectively barred one popular candidate from standing (Ekrem İmamoğlu, mayor of Istanbul) by bringing a spurious charge of "insulting election officials". He didn't need much more in the way of dirty tricks because of his control of broadcast media & his cowing of the press. He pretty much shut out the opposition from TV, etc. coverage. That meant the election was not fair.
So, it's likely that the final tally of votes is correct, & Erdogan got 52% in the second round. Opposition supporters weren't prevented from voting & their votes were counted. But that doesn't make it fair.
Free and fair elections: definition, 8 standards to meet
The Turkish election met 6 of 8 standards fully, AFAIK, but it was poor on nos. 2 & 3.