Problem with changing DSL provider

Dear,

I currently have a DSL contract with 1 & 1, and I wanted to switch to O2 DSL. So, I have done the following:

1. I have the new provider, and I am sending you my change request to 1 & 1
2. Additionally, I have sent a letter to 1 & 1, by fax (attached)

My contract with 1 & 1 can be stopped on 28/02/2019, if i request the termination before 14/02/2019, stating this.

Very quickly, I have a letter from 1 & 1 stating my "notice" and the date of termination correctly (see attached).

After one week, I am looking forward to receiving a second letter of notice from 1 & 1, stating a new date of 10.01.2020 !!! (see attached). This is what they say about O2.