Samsung ZFold, eSim

i am unable to make phonecalls for last 7 days despite restart and phone reset .... Despite good signal. After longwait error appears. Not registered on mobile network or no signal. Then emergency calls only. Internet data works however after sometimes and call can be made through data use or WiFi. Its dangerous in case of urgent requirement phonecalls need to be made as often travelling. GL1 and EX31 areas mainly - is where phone is used