I believe dr5 has discontinued regular reversal processing services for B&W films, including Scala

Adox Scala 50 is the exact same film as Adox HR-50, as confirmed by Mirko, the CEO of Adox. HR-50 was rebranded as Scala because Adox feels that those who used to shoot Agfa Scala will feel more comfortable reversal processing a film with the name Scala as compared to HR-50. In reality, most films can be processed to get a positive or a negative image. Anyways, if you want to process this film to get a positive image, there's plenty of info in other responses about doing it at home vs. sending it out to labs. Or, if you'd like to process it as a negative, following the developing instructions for Adox HR-50. I prefer to develop Adox Scala 50 as a negative using Rodinal 1:25 for 10 minutes at 22 degrees C. Agitate for the first 30 seconds, then give it one inversion every 3 minutes. Also, be careful loading and unloading this film. Since it's the same as HR-50, it has infrared capabilities and may be more susceptible to light piping and fogging.

Adox films do not have a DX code so the ISO needs to be set manually.