Your VPS appear to rate limited by our techs due to ongoing IO abuse. You've generating way too any IOPS, causing high load on our node and performance degradation for other customers.
Please note that you use HDD storage and not SSD storage. HDD drives are slow, especially with random IO - if a customer like you start using the IO resources full throttle, this has heavy impact on the HDD RAID array performance.
With an HDD VPS we require that you respect the fact you're sharing HDD IO resources with other customers. Looking at the type of IO that you VPS was generating, it looks a bit like you where download/seeding torrent high rate. Torrents are very heavy on HDD drives if you don't limit the concurrent connections and throughput.
Your VPS has currently a 50 IOPS and 10MB/s IO limit, to protect other customers that would like to enjoy their VPS.