Thanks for your response @captbdel12 , I only just saw it. I was troubleshooting earlier & managed to find the fix that worked for my site but thank you all the same. The chunk I added to the style section, for anyone who may need it:
@media only screen and (max-width: 861px) {
/* For mobile phones: */
[class*="col_"] {
width: 100% !important;
padding-top: 0px !important;
padding-bottom: 0px !important;
}
[class*="wrapper"] {
width: 100%;
}}