Worst call centre

I have been trying to sort out my kids savings accounts for weeks now. Each time i get no help.as they keep.cutting my call. I need to enter verifcation details but no one phones back even if they have.my details in front of me. So i have.to on my cost phone back several times still without help. Contacting their care deaprtment also result in being ignored. Worst customer care process and help.