Poor service

My phone was blocked.. So I went to mtn shop to request the puk no unfortunately I was told the only way to activate my number is by doing Sim swap... I did and paid R115 for the Sim swap... The guy who was helping me told me to switch off the phone for the next 4 to 12 hours in order for the Sim to work.... To my suprise it was not working so I went back to shop he did the Sim swap again and it is not working.... It's been 7 days without my number.... I've been using that number for the past 15 years so technically my life has stopped since most of my things are linked to that number...