Complaint again before something is actioned

I'm an existing customer, when applying for things they shouldn't take for long and should be prioritised. Basic marketing principal=it's better to keep existing customer than fetching new customers.

Anyways I'd like timing commitments from you, not the "I'll escalate and we'll get back to you after we receive a response".

I always find myself having to complain before something is done......I know I've said i'll leave the bank a couple of times but due to admin which I hate, i become reluctant. You're skating on thin ice.