TT wrong added account charges - still causing disruption

[TTsouthampton]

I usually pay manually using my card. However in November I was spam called by TT (TalkTalk) and told I'd get £5 off if I set one up. I duly set one up and then in early December, 10 days before due, I 1. cancelled the DD and 2. Extended by payment date towards the end of the month. TT emailed me confirming the extension was setup and advised that Ijust needed to pay manually when it was due.

Despite this, I was annoyed to see a £12.50 charge for a failed DD added to this month's bill. After a lengthy chat with TT support yesterday (they took a long time to understand) they agreed to credit off the extra charge and said this would be done within 48 hours. However, my bill is due today but the online balance still isn't correct. I'd like confirmation that if I wait to pay the correct bill, I won't get another charge added. By TT's own deadlines this could take another day, but I can't rule out it taking even longer.

One mistake by TT continues to have further effects and disrupt my life. Really they should be compensating me for the mistake and the time it's taken to resolve this. I hope someone from TT can advise.

[TTsouthampton]

Also, if any TT staff are able to look at my account. I took out my new contract in November. A £5 a month discount for 3 months was agreed as a condition. Further to this, I was 'offered' (spammed until I accepted) a one-off £5 discount for registering a Direct Debit in November (to be applied in December). In November's bill, the £5 discount was applied successfully alongside a further £2.70 (?); In December's only one £5 discount was applied(there should have been two) and in January only a single £2.30 (?!) discount was applied. All of these are labelled as "Loyalty discounts" which I assume is the catch-all term for a discretionary discount of any kind. 

In summ:

Nov: £5+£2.70

Dec: £5

Jan: £2.30

In total, one £5 discount is missing, though the discount/s have been applied in a confusing fashion.

When showing up, each of the discounts is labelled as being applicable until January 14th. However, as described, they have either been missed totally at times between Nov and Jan or not applied in full.

[TTsouthampton]

Naturally, I understand the original bill can't be altered. As per what I actually  said "the online balance still isn't correct." This is still the case and the credit hasn't been applied.

[Gliwmaeden2]

@TTsouthampton, the bill itself cannot be altered [just as though it were printed] but staff on here should be able to check that the £12.50 has been waived, and confirm what to pay.

Your thread is in the queue for attention. 

[The earlier post duplicates this and got removed.]