@Tim ******
Okay you got mostly correct answers from the other posters (and I deleted the ones that weren't correct).
Sadly for you, you didn't get the visa approved in time to enter thailand (so while you do hold a valid tourist visa for thailand) you DIDN'T use it to enter the country on and you clearly got in on a 30 day visa exempt entry. AND you've clearly overstayed that stamp.
SO while you might prefer not to pay a fine that's not in the cards ๐ฎ ,
IF you wanna stay longer (without leaving and coming back to use your still valid 60 day tourist visa) you need to do exactly what people say, GO to the immigration office pay the overstay fine at 500 baht a day (which as of today is 20 days overstay or 10K baht) and THEN apply for the 'regular' 30 day extension for 1900baht.
OR
You go to the airport, pay the 10K overstay fine, fly out and back in (meeting all the entry requirments again) and this time present your still valid eVisa tourist visa PDF and you'll get stamped in for 60 days,
There is no way to get out of the overstay which you have accrued and are continuing to accrue at 500 baht a day ๐ You didn't enter on a tourist visa (as you weren't approved to even HAVE a tourist visa until after you were already IN the country) you're here on a visa exempt entry,
You got one option of you don't wanna leave; go pay the 10K baht overstay fine and get the 30 day extension for 1900baht. ๐