Endless phone calls.

I’m client of home choice and quite happy with my products, but I have been harassed with phone calls since opening an account, I get at least 10 phone calls a day including weekends all because they have mixed up my number and my sister’s number who also has an account with them. I have tried multiple times to give them her number but they either hang up before they can take the number or take the number and not make the necessary changes. I’m honestly ready to close my account because I cannot take any more of the calls.