Unhelpful agents

I have tried to change my incontact num via chat and online however ive been successful

Its been two weeks of back and forth I have repeatedly tried to change my cellphone number for my otp all I want to do is buy using my ebucks I cant do that sent emails no help just useless back and forth. Tried updating on online then I get an error message stating that some functions have been disabled so why the hell did the web agent send me uses steps on how to go about it if I wouldn't be able to do it myself