Advice on landing a graduate offer

Hi! 
First time posting (so apologies if the post is a bit disorganised).
I'm in my final year of my undergraduate degree (in the UK) and I'm feeling a bit stressed due to the lack of any graduate offers at this current stage. I've had a rough year in terms of applications in general (hardly had any interviews especially when I used to get assessment centres / offers in previous years) and am just feeling stuck on what more to do. 
So far I've: 
-Filled in graduate scheme applications for PWM as they opened throughout the year 
-Have tried to cold email companies (have either been met with no response or that the firm is not hiring for the foreseeable future) 

-Attempted to use LinkedIn (though am not sure how really to use the platform efficiently for this since the networking culture seems a bit different in the UK compared to the US) 
I've also: 
-Gotten my CV checked by multiple people as well as university careers team 
-Conducted mock interviews with the university careers team and have received positive feedback 
-Have had a summer internship as well as a placement year 
Kind of gotten to the point where I just don't know what more I can do as nothing seems inherently wrong but due to the lack of interviews / offers there has to be something that needs to be changed / added, so would appreciate any tips on what more I can add to try breaking into PWM / Private Banking.