<a href="https://wa.me/56977507151?text=Hola Radio Futura FM.  Quiero pedir una canción y enviar mis saludos!" class="whatsapp" target="_blank"> <i class="fa fa-whatsapp whatsapp-icon"></i></a>

<style>
  .whatsapp {
  position:fixed;
  width:60px;
  height:60px;
  bottom:100px;
  right:40px;
  background-color:#25d366;
  color:#FFF;
  border-radius:50px;
  text-align:center;
  font-size:30px;
  z-index:100;
}

.whatsapp-icon {
  margin-top:13px;
}
</style>

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

Whatsapp Bottom Fixed

<div class="banner-escritorio-wrapper">
  <a href="https://tarifas.servel.cl/visualizar/96e3635482931764c6834afddaa568e71bf4881d" target="_blank" rel="noopener">
    <img src="https://s3-mspro.nyc3.digitaloceanspaces.com/tenant/680954f242f6a58ed33b72dd/mediaLibrary/photo/7904a338-6df4-4020-b6ab-e820373689dc-medium-standard-q100.jpg?v=1747426503" 
         alt="Publicidad Escritorio">
  </a>
</div>
<style>
  .banner-escritorio-wrapper {
    width: 100%;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    margin: 20px 0 !important;
  }

  .banner-escritorio-wrapper img {
    width: 970px;
    height: 65px;
    display: block;
  }

  @media (max-width: 768px) {
    .banner-escritorio-wrapper {
      display: none !important;
    }
  }
</style>