How to make one of the Open Sans and Roboto default one?

Dear TagDiv,
I disabled Google fonts. Why family of Montserrat is loaded?

</style><div class=”wpb_wrapper”><div class=”td_block_wrap tdb_header_logo tdi_10_779 td-pb-border-top td_block_template_1 tdb-header-align” data-td-block-uid=”tdi_10_779″>
<style>
/* custom css */
@import url(“https://fonts.googleapis.com/css?family=Montserrat:400,300,300italic|Open+Sans:300italic,400,400italic,600,600italic,700,300|Roboto:300,400,400italic,500,500italic,700,900,300italic&display=swap”);
@import url(“https://fonts.googleapis.com/css?family=Roboto:300,400,400italic,500,500italic,700,900,300italic|Open+Sans:300italic,400,400italic,600,600italic,700,300&display=swap”);
.tdi_10_779 .tdb-logo-a,
.tdi_10_779 h1{
flex-direction: row;

align-items: center;

justify-content: center;
}.tdi_10_779 .tdb-logo-svg-wrap{
display: block;
}.tdi_10_779 .tdb-logo-img-wrap{
display: none;
}.tdi_10_779 .tdb-logo-text-tagline{
margin-top: -3px;
margin-left: 0;

font-family:Montserrat !important;;
}.tdi_10_779 .tdb-logo-text-wrap{
flex-direction: column;

align-items: center;
}.tdi_10_779 .tdb-logo-icon{
top: 0px;

display: block;
}.tdi_10_779 .tdb-logo-text-title{
color: #ffffff;
}

There is mention that “The theme comes with two preset default Google Fonts: Open Sans and Roboto.”. How can I make one of them default one?

Thanks

Thats true. It says its default font. How can I change this default font to other font?

In Theme Panel I have all fonts (except Pages) set to default.
There is mention that “The theme comes with two preset default Google Fonts: Open Sans and Roboto.”. How can I make one of them default one?

If I use Default font on elements, what font is used? Open Sans or Roboto? Where can I set the needed one?