We can definitely request a redelivery for your release. It's understandable that these products likely pre-date Spotify or were on our system before Spotify delivery became standard.
Please be aware that the the digital music service specifications change fairly regularly, and your release may need to be re-uploaded from scratch with new art work and metadata amendments. The team will be able to advise upon further inspection of the product.
As standard, for any releases originally uploaded prior to 2015 we need new artwork that is at least 3000x3000, so please have this ready when you request a redelivery via the Portal Contact Us page.
Our full artwork specs are available here, along with our other asset specifications. It's definitely worth reading about our audio specs in case the audio requires an update.