Cellc simswap mission impossible

I lost my phone few weeks back but now cell agent cannot do a sim swap because according to their system there’s one thing that is incorrect but they cannot reveal what is it exactly that I’m giving which is incorrect. One of the obstacle here is the cellc requesting 5 number one recently called , we are using WhatsApp to communicate and make calls on rare occasions. The simswap is impossible at cellc , the system is difficult for me and not customer centric. I give a recharge date , recharge amount, the date of recharge , the 4 people I called why am I not told which information I gave w wrong. Many people in years have to change their number because Of this difficult with cellc