Waiting for delayed installation compensation

My broadband installation was delayed and I was told that I would get automatic compensation. I didn’t so I contacted VM on the 30/6/25 and was told -

I understand that. Since 6.24 per day is the charge, I am calculating it for 47 days which will sum up to 293.28GBP and in that 30GBP is already adjusted in the bill, remaining 263.28GBP will be added from my end which will reflect in the account within 72 hours. 
After 72 hours nothing. I again messaged VM yesterday and was told it would reflect in my account in 24 hours. Still nothing after 24 hours. 
They gave me £30 and when I asked about the £6.24 a day compensation ended the conversation. The second agent sent the above message. So the £30 or the £263.28 has not been applied to my account. I’ve been issued two complaint numbers.