wife not allowing my kids to see my parents

Contact a local advocate for guidance in getting a divorce for a valid reason, only if there is no possibility of reconciliation through elders.  Even after a divorce, anyone can visit their children in custody of others.  You can, in fact, ought to have sent a notice to her to come back and for "restitution of conjugal rights".  Even getting a divorce through court is not simple, make negotiation for mutual first, and the expenses of such divorce are many.

Repeated query.

It is absurd and ridiculous to repeat same story time and again.

If you are not satified with obligation (FREE OF COST) of experts on this platform it is advisable to consult and engage a local prudent lawyer for better appreciation of facts/ documents, professional guidance and proceeding.

Emotion is not the instrument to pacify the misunderstandings. so you explain the situation amicably with affection. sure you get the result. For this small reason to take hasty decision will spoil the family life