Can anyone recommend: Electrician

You may be on a 3.3kw supply.

You can check this by looking at your electric bill.

If you are on a 5kw supply & the electric keeps tripping out you may possibly have a faulty piece of electrical equipment.

You could upgrade your supply to a 5kw supply BUT be aware that your standing charge will increase dramatically. From around 12 or 15 euro per month to around 23 euro per month.

If it is just a holiday home it might not be worth it this extra on the standing charge.

No idea of the cost of actually upgrading the supply, knowing the Spanish it will be a long slow & expensive process.

The fact that your electric keeps popping off as you put it ..has nothing to do with the electrical supply...you could be simply drawing to much electricity through your consumer switch box ...try running less electrical appliances at the same time ...for instance we have three AC units but if you turn on any more than two at anyone time the overload reset trip will pop to protect the cables from over heating ...but it is possible that you have a faulty appliance to check this out simply turn everything that draws electric in the house off ...reset the consumer unit and then turn only one appliance on if it doesn't pop the reset turn it back off and then go to the next one and do the same right through the house if no individual appliance pops the reset ...then you are simply drawing to many AMPs / power through your consumer box ..

Thank you so much for all your advice 

This happened to us whenever we turned on the oven. We bought a new oven and hey presto all is fine now without doing anything else to the electricity!