if you miss appearing at the mediation centre the mediation centre will treat it as default and send the case back to the court where it will be listed and your stay of arrest may be vacated. The vacation of stay of arrest will land you in trouble as you dont know the bail for the main accused in 498A charge is difficult so you will have to take directions from Allahabad HC - which will give you a order that the magistrate shall grant you Interim bail on first appearence and final bail application shall be decided thereafter.
Dont take mediation lightly - its the base for your stay of arrest. You can check the mediation date at the Allahabad Mediation centre by calling @ 0532-2423865 Mr Vijay Singh is the centre incharge you can tell the Criminal writ petition number and check whats the date or in case case has been sent back due to your non appearence.
The case status can be checked at the link below:
https://allahabadhighcourt.in/casestatus/inputTNYA.html?G=17
See remember there is no benefit of lingering this on if she needs divorce agree for that and in return she will take this case back. The anger that you have now will not benefit you and you will realise later. if your wife dont want to live with you let her go and you start afresh instead of loosing time for seeking revenge.
The mediation centre only offers three options:
1. You agree to stay together.
2. You take divorce and settle any alimony.
3. Mediation fails and you come back seek bail and fight out here in local courts.
First Check your mediation stage and then will advise the next steps as future steps depends on the mediation stage. You still did not make it clear that whether you appeared for mediation once or not and if the case has been sent back to court for your non appearence. If you are not sure check on this number.
I am not sure if the mediation centre works at this time as Allahabad High court is off these days but you can try. Dont take mediation lightly else be ready for bail for yourself and all members charged.