problem to change PAYG plan

[aloha26]

One month ago, I bought an EE PAYG sim card. Today, I have received a text from 150 that said:

IMPORTANT: you need £15.00 for your SIM Local Pack to start automatically. Please top up on ee.co.uk/myee. Until then standard rates apply: 40p/min & 20p/text in the UK
To use data on your phone, you'll need an add-on or pack. Click here to buy http://add-on.ee.co.uk/text

I know that my pack is expired, and I decided to choose the £10 plan (8GB,...). So,I toped up my EE account on the EE app, and my current credit is £10. After, I text ALL PACKS to 150,
response:

We have a new range of packs to choose from and now you can get 10% off any pack you buy when you set up direct card payments. Just head to MyEE to get set up.
If you already have direct card payments set up or want to buy a pack with your credit, text one of the codes below;

a £5 Pack, giving you 250MB of data, 250 mins, and 500 texts, reply PACK05
a £10 Pack, giving you 8GB of data, 500 mins, and UNL texts, reply PACK10
a £15 Pack, giving you 25GB of data, UNL mins and UNL texts, reply PACK15
a £20 Pack, giving you 50GB of data, UNL mins and UNL texts, reply PACK20
or a £30 Pack, giving you 125GB of data, UNL mins and UNL texts, reply PACK30
For information on all our packs please visit ee.co.uk/payg

So, I replied Pack10

but I received this message which £10 plant had disappeared... and start from £15

Sorry I didn't recognise that.
We have a new range of SIM Local packs to pick from;
a £15 Pack, giving you 15GB of data, UNL mins and UNL texts, reply PACK15
a £20 Pack, giving you 30GB of data, UNL mins and UNL texts, reply PACK20
or a £30 Pack, giving you 100GB of data, UNL mins and UNL texts, reply PACK30

My question is, how can I choose a £10 plan to renew?

[XRaySpeX]

You would seem to have a SIM Local which does not have the full range of PAYG packs. As it says "IMPORTANT: you need £15.00 for your SIM Local Pack to start automatically".

Where did you buy it? Perhaps at an airport?

[aloha26]

Thank you for your attention.

Exactly, I bought it at the airport.

So, is not any way to buy a cheaper pack?

[XRaySpeX]

Dunno much about SIM Local; more familiar with ordinary PAYG SIMs & packs but from what it's telling you the min. pack you can get is £15. This is confirmed by EE SIM LOCAL PACK AND EXTRA DATA OFFER TERMS

[liam12542]

If you call 150 and speak to the PAYG care team they can change it to a regular PAYG SIM card and they should be able to start the £10 pack for you. 

Thanks Liam