It's a bog-standard advertising call, which won't interest the police.
However (unless the special price really does end tomorrow, which I really doubt) it's an offence to pressurise potential customers by telling them that they've only got limited time to take up an offer (when, in fact,they tell everyone that).
[Regulation 7, Schedule 1, under Section 8 of the Consumer Protection from Unfair Trading Regulations 2008].
So you could report them to Trading Standards if you felt like it.
https://www.gov.uk/find-local-trading-standards-office
Further, if you're registered with TPS, the firm shouldn't have called you and you should report the call to TPS:
https://complaints.tpsonline.org.uk/consumer