Hey,
I can fix the problem for the Shopify website getting slow and issue for acccess as well. I believe to make browsing faster it needs to be optimized and I know the techniques to optimize the Shopify sites for I have 12+ experience in this domain.
Have a glance on my profile as well for your satisfaction.
https://www.freelancer.pk/u/Taqitafsol
Keep in touch for I will guarantee the fixes will be done in your specified timeline.
Best Regards,
Taqi C.