Where can I fill the propane gas tank of my RV in Tenerife?

Hello everyone,

I have an RV in Tenerife. Unfortunately, The Propane gas tank was almost full when I brought it over so there was for about 10 years of gas (only for cooking, who needs heating on Tenerife) but I forgot to close my gas tank last time I came over and it ran slowly empty.
I know there has to be a filling station somewhere, since pretty much every house in Tenerife uses this refillable propane gas containers, which is pretty much the same as the one in my RV. Only difference is that the one in my RV is built in :-(
I really hope someone can help me because I feel pretty stupid cooking on a crappy Camping-gas fire while I have z
a 3 burner, High BTU cooker in the RV....

All tips welcome!

Kind regards,
Tim