My employer don't want to pay me

My employer has changed my shift to start 2 hours earlier but didn't notify me, team manager explained that there were posters all over the workplaces but I havent seen any and I was working for past 3 days prior to the day I was allegedly (late) My manager said I wont be paid for that day as I was late and I can use my holiday to cover it if I want to.

3 days before that day I was working not a single manager informed me that on this specific day we start earlier, I didn't receive email, text or letter.

Can you advise me what should I do ?

Did you work the day that you were supposedly late?
Whatever the ins and outs were of you being late- they cant just not pay you for hours worked.
If you don't get anywhere with them id speak to either ACAS or the citizens advice bureau.

I was scheduled for 14:30 on the 31st of December i worked 28th 29th 30th no one informed me that there is schedule change I turned up for work at my original time 16:30 they told me there is no work for me and they told me to go home they said that the information about schedule change was on the posters in workplace but I havent seen a thing i spend 5 minutes top in the workplaces as I work.as a lorry driver so my job is mainly outside of the depot

Oh right.
I was going to say if you actually worked then they would have to pay you. But seeing as you didnt actually work that day then they dont have to.
Although you dont spend long at work, if they put posters etc up then the company has at least tried to inform staff and it is up to the staff to read them. Yes they could have told staff face to face as well as putting the posters up. But the company has at least tried to inform staff. Its not the companies fault if staff dont read them, for wharever reason.
They have at least offered you the chance to use a days holiday to cover that day. They dont have to do that.

I worked for company over 9 years now, my contract is very specific if I turned up for work I have to be paid, our depot have over 1500 people working a poster about schedule change is not really efficient way of communication

My employer has changed my shift to start 2 hours earlier but didn't notify me, team manager explained that there were posters all over the workplaces but I havent seen any and I was working for past 3 days prior to the day I was allegedly (late) My manager said I wont be paid for that day as I was late and I can use my holiday to cover it if I want to.

3 days before that day I was working not a single manager informed me that on this specific day we start earlier, I didn't receive email, text or letter.

Can you advise me what should I do ?