No assistance when asked multiple times

An now at the end of March, after I have sent in all proof of payments and details requested, and after I was told the payment was allocated, my balance has remained unchanged. You did not allocate the mentioned payments or any other payments I made after that (with the correct reference number).

Good morning
I am sending you a message here because I have sent numerous emails to this email address: *** (this is the exact email on the letter I have received, which I have copied and pasted) and every single time I get a message that says the email address does not exist. 

I have received a collection notice, saying I need to pay R4 019.26.

Please note that I have already emailed you regarding this. 
My contract was canceled due to two payments for Nov & Dec 2020 that was not allocated. I accidentally used the wrong reference number and struggled for about 3 months to get cell c to allocate it to the correct account. I followed all instructions you gave me.
After it was finally allocated I never received a normal invoice again and I also didn’t receive any assistance to activate my account again. This after I have been a loyal client of cell c for at least 7 years. 
So I am stating to you again. I do not have R4000+ to settle this account. I am asking you again, can I make an arrangement to pay R1000 per month until it is settled? That is all I can do at this time. 
I am asking you again for assistance in this matter. Could you please reply to this email and let me know if this will be acceptable to you?
Maryke Terreblanche  ***

Can you please give me the correct email address for ***, this one does not work. I copied and pasted it from the letter you sent me, but it does not work.

Can you please give me the correct email address for Collection Queries @ cellc.co.za, this one does not work. I copied and pasted it from the letter you sent me, but it does not work.

I have sent it to that email address as well this morning.

I haven’t received any feedback yet? I’ve sent it to the email address you gave me. Can you just tell me if the arrangement is acceptable?

So today, after months of asking for assistance I just received a message that says I’ve been handed over to SSDA. First my contract was cancelled because two payments were not allocated. Then I’ve asked you multiple times to make an arrangement to pay off the cancelled contract. I was willing to pay R1000 per month, double the amount of my monthly contract. You couldn’t even do that for me, after I’ve been a loyal client since 2014, with multiple contracts. Thanks for nothing I guess!

I’m not interested in private messages at this stage. I’ve been handed over, it’s going to negatively affect my credit record.

No revert?