Truworths don't even know

I have had my account for some time now but since the beginning of the year i was unable to link my online account with my credit account card as i was not receiving my otp. After a bit of up and down struggle i manage to update all my info aspecially my new cell number of my new phone purchased at truworth. But nevertheless attempting to link my account again it still gave me temporarily locked as which i phoned the number given and explained 3 to 4 times as i was forwarded each time the whole story and only real answer i got was they can't see anything wrong on the system . Reseted everthing loged out and try again ,no luck after 3 time calling i was told they are exulating the matter to higher person and i will be called back. I wS called and told my nuber was not updated but at end it was correct and was told again that they ate now exculating it even higher and some one wil call me back. I am still waiting for some one til today almost a month later . What to do now will be my question as i have come to a stop again . Also bare in mind i am shopping on my account regularly with out any problems its just my online thats a issue.