Problem with website, can’t change call package

[#1]

My parents would like to change from Anytime to Unlimited UK and Mobile Calls. The website only gives them these options:

Plusnet Weekends
Plusnet Evening and Weekends
Plusnet Anytime International 300

Are they doing something wrong?

[#2]

Hiya @GlitterChick, thanks for getting in touch!

I'm sorry for the issues your parents are having changing the plan and for the hassle caused trying to get this sorted! It sounds like they may be on a legacy broadband product. 

I'd like to help with getting this sorted for them Can you please pop me over a PM with their username so I can take a look? (to send a PM, click on my name and then to the right, there will be a grey button to 'send private message' and in the message please include a link to this thread)
 

[#3 · Accepted solution]

Thanks for the PM, I've now responded. 

[#4]

All sorted, thank you so much for your help!