I am not at all sure what an explanation plugins pack is but refunds are subject to Magix' Terms and Conditions, which can vary depending upon which area of the world you live.
Assuming you bought the product very recently you should apply for a refund by email to infoservice@magix.net, giving full details of your purchase and why you are requesting a refund. And no, there is no 24hr customer service, all support is via this forum or, for more technical questions, via the Support header in any forum page.
I PURCHASED MAGIX 2022 LAST YEAR IN THE END OF SUMMER BUT BY DECEMBER OF 2022 I PURCHASED MAGIX 2023 AND IT REMOVED MY PROGAM THAT I PAID FOR FOR A MUSIC STORE ONLINE, NOW THE PROGRAM GOT SO MANY GLITCHES IT WILL NOT WORK RIGHT THE MUSIC IS DRAGGING AND THEN THEY TOLD ME I NEEDED TO PURCHASE EXTRA TRACKS AND I DID NOW IEACH ONE OF THE SONGS I DID WON'T STOP ECHOING ACROSS ALL THE SONG I CREATED AND EVEN NEW ONES... I'M DONE I JUST WANT THEM TO GIVE ME MY MONEY BACK AND PUT THE PROGRAM/SOFTWARE YOU REMOVED IT WAS WORKING SO MUCH BETTER, THE APP STORE IS FILLED WITH GLITCHES EVEN IT IS VERY SLOW MOVING AND ALL THIS HAPPENED AFTER I PAID FOR SOUND FORGE...PLEASE HELP I DON'T WANT THIS ANYMORE I WANT ALL MY MONEY BACK I SPENT ON THIS PRODUCTHAT WON'T WORK PLEASE HELP!!!!
Please do not type in all capitals - it is considered as shouting and is bad forum etiquette.
You are outside the refund period as specified in the Magix Terms & Conditions however you can try contacting Magix as detailed in the post directly above yours, alternatively if you want to go back to the previous version, ask for a link to the download and install this.