Bought a property in Alcossebre Spain, and would really appreciate some major help and advice.

The estate agent i've commissioned to sell my property are absolutely useless as it has been with them for a long while and i've recently found out that there is no for sale sign outside the property and the property doesn't seem to be marketed anywhere.

Can someone please advise on alternate methods i can use to sell my property quickly.

Any advice will be greatly appreciated