Did two divorces occur or only one, and is revoking it by phone valid, and what are the conditions for her return after her family insisted on a new dowry, قائمة (list of contents), and movable possessions?

If the second divorce pronouncement was a confirmation of the first, then it is considered a single, revocable divorce. The waiting period (iddah) begins from the moment the divorce is pronounced, not when it is documented. If you take your wife back before the iddah ends, the reconciliation (raj'ah) is valid. Otherwise, a new contract and a new dower (mahr) are required. Reconciliation is like a new marriage, and the dower is according to agreement, and it is encouraged to facilitate it. If the woman is infertile, it is preferable to marry someone else so that Allah may bless you with a child, as Islamic law encourages procreation.