Reliable plumber in/near Blanca?

Hi all

We have a holiday home in Blanca and have a strange problem in the bathroom/outside waste drain. Flying home tomorrow so will have to sort something out from the UK.

Can anyone recommend a plumber in/near Blanca who might be able to go over (we can arrange a key with a neighbour) and have a look without us being there? 

I can do Spanish by email/text but terrible on the phone. English-speaking plumber might be easier but also like to use local tradespeople where possible (bearing in mind the language issue). 

Any suggestions gratefully received. 

Thanks.