because hotels can provide their own prices and promotions to each site, and hotels can choose whether to allow their listing on each site to also appear on other sites. So when you see a lower price on one site but not the other, the hotel has selected not to make their specific offer/promotion available on partner sites.
they are called partner bookings. Each site has its own deals with hotels but when one is cheaper than the other, they show the other site's price offer. Both websites share each other's offers and you happened to have booked the Booking.com offer on Agoda but you could have also booked Agoda's offer on booking.com. It is not true that all Agoda bookings go through booking.com. You just happened to have picked the offers that are being provided by booking.com.
Are you sure they didn't just get the standard 30 day extension? Most immigration offices require you get the 30 day normal extension first before you are allowed to apply for the 60 day Covid one.
One is higher audio quality. The cheaper one sometimes on a call can sound like internet telephony, versus the premium one sounding like any normal phone call.
Why not just use your Thai carrier and dial internationally using one of the special codes that allow super-cheap special rates to call overseas. All 3 carriers have a cheaper code that charges at 1 baht a minute for calls to the USA, and a more expensive "premium quality" version code that charges 2.5 baht a minute. Either way is way cheaper than dialing an international call using the normal "+" format. For dtac, dial
*****
then the country code, area code and phone number. Calls to the USA are 1 baht a minute. Or use their "premium quality" code instead which is 004 + country code etc which costs 2.5 baht a minute. For example, dialing New York City using the premium code would be dialed as something like 004-1-212-XXX-XXXX. There are similar codes for True (
*****
and 006) and AIS (
*****
and 005) which charge the same 1 baht/2.5 baht a minute.
What's the problem? If you actually have a qualifying booking, contact the hotel and they will give you the special confirmation. If you don't have a qualifying booking, then that's why the Agoda confirmation shouldn't be accepted.
it's the Samui Command Center direct line that SHA PLUS hotels can use to communicate with them. Only for official hotel use between hotels and the government command center.