Uh oh.

Spice Girls fans have demanded refunds after there were even more issues with the sound quality at their Cardiff gig. Emma Bunton, Mel C, Mel B and Geri Horner took to the stage at the Principality Stadium on Monday evening - but all fans could talk about was the sound issues. Many frustrated fans took to Twitter to fume about how they couldn't hear the group properly once they were inside the venue. Some said that they wanted their ticket price back, while others said that they had walked out of the gig entirely. Similar complaints were made after the Spice Girls' gig in Croke Park on Friday night, with Mel B promising the next morning that the sound "will be much better" at Cardiff.

Amazing show from @spicegirls but the sound was terrible! Can barely hear vocals!!! #spicegirls #Cardiff pic.twitter.com/ShzqRnBIfH

— • R H I • (@only_rhi) May 27, 2019

The @spicegirls show in @principalitysta could’ve been amazing but unfortunately sound quality from our seat was really poor...couldn’t hear what they were saying or hear their vocals! Surely this is a basic requirement of a concert @TicketmasterUK ????? ???

— Julie Hughes (@Julie8983) May 28, 2019

Spice girls gig at Cardiff principality stadium last night, the sound was atrocious and could not hear what they were singing, very strange as Jess Glynne was the supporting singer, and her sound and vocals were amazing, you could hear everything she sang perfect.

— paul ryan (@gooners63) May 28, 2019

Was looking fwd @spicegirls since tickets came out-huge disappointment @principalitysta! Couldn't hear the girls at all when speaking+the sound during songs weren't much better. Love @EmmaBunton @GeriHalliwell @OfficialMelB and @MelanieCmusic £70 A ticket 2 listen 2 audience ? pic.twitter.com/kcVfXwwmdN

— Lisa James (@lisajames0174) May 28, 2019

You put on an amazing show in #cardiff @spicegirls but please please have a word with your sound guy. I could barely understand what was being said/sung ✌️

— James Gurney (@the1gurnster) May 28, 2019

Okay so @spicegirls was so much fun however the sound was atrocious and you could not hear what they actually said! So disappointing when you pay soo much for a once in a life time opportunity ?

— Champagne&Lemonade (@LemonadeLifeox) May 27, 2019

The Spice Girls' Spice World 2019 tour will continue at the Etihad Stadium in Manchester (May 29 to June 1), before going to Coventry's Ricoh Arena (June 3-4) and Sunderland's Stadium Of Light (June 6). The iconic pop group will play Edinburgh's BT Murrayfield Stadium (June 8), Bristol's Ashton Gate Stadium (June 10) and London's Wembley Stadium (June 13-15).