you should correct the ph at 7,2 then you should perform a pool chlorine shock and let your filter working for hours, if you have that issue one or both ph or chlorine level are wrong or your filter doesn't run enough hours per day,
you can apply online for a new one, then you can use a friend or a family member to ship it here.
you can buy an old phone for few bath and use your ancient sim card
I guess because you have done it on 1st nov 22 so when you collected your visa on 9 January(not on 29) was too early, btw I'm not sure if you should count since 1 November as you extended your visa after that.
what kind of medium?, if you are in coco you can watering at 5,5 but before flush the roots and then check again the dirty, try to have at least 10% dirty when watering, so salts don't build up in your medium.