Whoever goes for such procedure in order to get back to his wife, he and she are cursed and also the man doing that for them and even after all of that, she can’t remarry him again.

If you divorced her three times reconciling between each time, this counts as one single divorce. If she is in her Iddah period, you can get back together without a new contract.

Married since 20 years having 2 kids, then got married second secretly without telling the first wife, but second wife knows that I am married, then 2nd wife broke secret of our marriage to my 1 St wife in spite of me warning her not to do. This lead to fight and I had to give her 3 talaq, now we both regret and we wish to reunite, is this happened for our betterment or I should go for an hallah.