Things to try with your VPN account with us:
If you are on a PPTP VPN account with us, make sure you try L2TP Protocol. ( Instructions can be found in Welcome Email or Knowledgebase )
Try a different location - SwitchVPN in most locations offer servers in different network locations.
For example in the US we have over 6 different network locations.You can try speed tests on different networks we offer to see if there is any benefits. It could be that one network is better for you then another.
If Problem Still Persists , feel free to Contact us on Live Chat or submit a support ticket from Client Area. We Provide 24x7 Customer Support and Remote assistance. feel free to contact us.