Kids uk visa settlement 12 weeks no information from HO , how to escalate?

[Annie02]

Apply for my 2 steps kids visa to join us with my husband, location RD Congo, online submission the 15 March 2019 , document submitted: 21 March 2019, in the 20/05/2019 receive the message from the HO this message
Dear .....,,,,,...

Regarding Visa Application: ...,,,,,,,,,,,,,,,

Thank you for your online application which has been received at the UK Decision Making Centre. Your application is currently being prepared for consideration by an Entry Clearance Officer.

PLEASE NOTE: This email is to acknowledge receipt of your Settlement application, if you or your UK sponsor have not already submitted your supporting documentation please ensure you follow the process listed below: UKVI is unable to consider your application without these documents.

*TLS locations
Applicants from TLS locations may still send their supporting documents to the following address until further notice (they should include a suitably sized self-addressed envelope with appropriate postage for return of the documents):

Sheffield Visa Section
PO Box 3468
Sheffield
S3 8WA

Please note that UKVI aims to complete all Settlement Visa applications within 12 weeks of the submission date. If it is not possible to complete your application within this timeframe a member of our team will contact you to explain why.
If you have paid for Priority Service we aim to complete your application within 6 weeks of your submission date. If it is not possible to complete your application within this timeframe a member of our team will contact you to explain why.
As indicated in the terms of service, the amount paid for the priority service, as well as the visa fee, is non-refundable, even if the visa application is refused or if the decision is delayed.

We regret that we are unable to respond to enquiries asking about the status of any application. Any status enquiry should be made to the international enquiry service, details of which are on the GOV.UK website;
https://www.gov.uk/contact-ukvi-inside-outside-uk
Staff at Embassies, visa processing centres and visa application centres cannot assist with visa enquiries. You may also wish to view the current processing times for applications made in your country:
https://www.gov.uk/visa-processing-times
We will not contact you again unless we require any further information regarding your application, otherwise you will be contacted by the commercial partner at the application centre where you submitted your application when your decision is ready for collection.

Please note that you are advised not to purchase flight tickets until you have secured a visa for travel to the UK.

Kind regards,

UK Decision Making Centre


This is an automated message - please do not respond to this email address as incoming mail is not answered. UKVI contact details can be found at www.gov.uk/contact-ukvi-outside-uk


This email is intended for the addressee(s) only. All messages sent and received by the Foreign & Commonwealth Office may be monitored in line with relevant UK legislation
available at https://www.gov.uk/government/organisat ... on-charter

And nothing, not updated about NHS health surcharge it is almost 12 weeks, can escalate now to HO?