Regret getting Smarty..

Since I installed a Smarty esim I've had nothing but issues. I can't sign into some apps.. specially Booking.com which I'm using all the time. I've reinstalled apps, reset network settings, etc. until I'm blue in the face but no luck. This connection is very erratic a d unreliable. It also drains the s24 battery at an alarming rate.. even after switching to 4g. Any help or guidance would be greatly appreciated.  Thanks.