Shell V+ reward card bad service call centre

Good day, this is a very frustrating experience with Shell regarding their V+ Card..I tried to change my cellphone nr on the V+ customer rewards card going for almost 2 months now..I am told by the customer centre that my number is changed to my new nr and I will receive a sms in 24 hours time(Be aware that it is called a emergency number change according to them) So I waited for 2 days and nothing..I called them a week later and asked them to repeat the number on their system..Still my old number, the operator again told me they will do a 'emergency number change' change for me i will be able to use the card rewards in 24 hours time.Well that was 2 weeks back and nothing ,no sms to confirm number change..So today again I called and again my old nr was the contact nr on my V+ card..And again I was told that they would do a emergency number change..So I said to the operator I don't believe their on-liner reply anymore I need something else today..Well he put me on hold and after a while told me that my nr is changed..I asked him about the sms I should receive to confirm my number change, he reply and said 'The sms won't come through directly after the change was made..Well I just went to the Petrol Station and my old number still shows as my current contact number. This is very bad service from a company I support for years now..Your call centre is not functioning Shell ..😡🤬